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Updates: 

Sorin Cosoveanu provided data from the 2011 census (source [10]).

ISO 3166-2 Newsletter Number I-4 is dated 2002-12-10. It shows the new Ilfov county. FIPS Publication Change Notice No. 9, affecting FIPS PUB 10-4, issued on 2004-10-01, also shows the addition of Ilfov.

Change Notice 7 to FIPS PUB 10-4 is dated 2002-01-10. The only changes affecting Romania are the spelling changes of 1990.

Country overview: 

Short name	ROMANIA
ISO code	RO
FIPS code	RO
Language	Romanian (ro)
Time zone	+2~
Capital	Bucharest

 

In 1900, Romania was a young kingdom (since 1881). In comparison with today's map, it contained most of Moldova, but the Austro-Hungarian Empire owned Transylvania, which now forms its northwest section. It acquired additional territory, including Transylvania, during the Balkan Wars and World War I. World War II caused a net loss of territory, establishing the present-day boundaries.

Other names of country: 

1. Danish: Rumænien
2. Dutch: Roemenië, Roemenie
3. English: Roumania (obsolete), Rumania (variant)
4. Finnish: Romania
5. French: Roumanie f
6. German: Rumänien n
7. Icelandic: Rúmenía
8. Italian: Romania f
9. Norwegian: Romania
10. Portuguese: Roménia, Romênia f (Brazil), Rumânia (Brazil)
11. Romanian: România
12. Russian: Румыния
13. Spanish: Rumanía f, Rumania (variant)
14. Swedish: Rumänien
15. Turkish: Romanya

Origin of name: 

Roman + country suffix -ia, adopted in the 19th century to reflect political and linguistic heritage from Roman Empire

Primary subdivisions: 

Romania is divided into 41 județe (sing. județ: counties) and one municipiu (city).

County	HASC	ISO	FIPS	NUTS	Pc	Population	Area(km.²)	Area(mi.²)	Capital
Alba	RO.AB	AB	RO01	RO121	51	342,376	6,242	2,410	Alba Iulia
Arad	RO.AR	AR	RO02	RO421	31	430,629	7,754	2,994	Arad
Argeș	RO.AG	AG	RO03	RO311	11	612,431	6,826	2,636	Pitești
Bacău	RO.BC	BC	RO04	RO211	60	616,168	6,621	2,556	Bacău
Bihor	RO.BH	BH	RO05	RO111	41	575,398	7,544	2,913	Oradea
Bistrița-Năsăud	RO.BN	BN	RO06	RO112	42	286,225	5,355	2,068	Bistrița
Botoșani	RO.BT	BT	RO07	RO212	71	412,626	4,986	1,925	Botoșani
Brăila	RO.BR	BR	RO08	RO221	81	321,212	4,766	1,840	Brăila
Brașov	RO.BV	BV	RO09	RO122	50	549,217	5,363	2,071	Brașov
Bucharest	RO.BI	B	RO10	RO321	01-06	1,883,425	238	92	Bucharest
Buzău	RO.BZ	BZ	RO11	RO222	12	451,069	6,103	2,356	Buzău
Călărași	RO.CL	CL	RO41	RO312	91	306,691	5,088	1,964	Călărași
Caraș-Severin	RO.CS	CS	RO12	RO422	32	295,579	8,520	3,290	Reșița
Cluj	RO.CJ	CJ	RO13	RO113	40	691,106	6,674	2,577	Cluj-Napoca
Constanța	RO.CT	CT	RO14	RO223	90	684,082	7,071	2,730	Constanța
Covasna	RO.CV	CV	RO15	RO123	52	210,177	3,710	1,432	Sfântu Gheorghe
Dâmbovița	RO.DB	DB	RO16	RO313	13	518,745	4,054	1,565	Târgoviște
Dolj	RO.DJ	DJ	RO17	RO411	20	660,544	7,414	2,863	Craiova
Galați	RO.GL	GL	RO18	RO224	80	536,167	4,466	1,724	Galați
Giurgiu	RO.GR	GR	RO42	RO314	08	281,422	3,526	1,361	Giurgiu
Gorj	RO.GJ	GJ	RO19	RO412	21	341,594	5,602	2,163	Târgu Jiu
Harghita	RO.HR	HR	RO20	RO124	53	310,867	6,639	2,563	Miercurea-Ciuc
Hunedoara	RO.HD	HD	RO21	RO423	33	418,565	7,063	2,727	Deva
Ialomița	RO.IL	IL	RO22	RO315	92	274,148	4,453	1,719	Slobozia
Iași	RO.IS	IS	RO23	RO213	70	772,348	5,476	2,114	Iași
Ilfov	RO.IF	IF	RO43	RO322	07	388,738	1,583	611	Bucharest
Maramureș	RO.MM	MM	RO25	RO114	43	478,659	6,304	2,434	Baia Mare
Mehedinți	RO.MH	MH	RO26	RO413	22	265,390	4,933	1,905	Drobeta-Turnu Severin
Mureș	RO.MS	MS	RO27	RO125	54	550,846	6,714	2,592	Târgu Mureș
Neamț	RO.NT	NT	RO28	RO214	61	470,766	5,896	2,276	Piatra-Neamț
Olt	RO.OT	OT	RO29	RO414	23	436,400	5,498	2,123	Slatina
Prahova	RO.PH	PH	RO30	RO316	10	762,886	4,716	1,821	Ploiești
Sălaj	RO.SJ	SJ	RO31	RO116	45	224,384	3,864	1,492	Zalău
Satu Mare	RO.SM	SM	RO32	RO115	44	344,360	4,418	1,706	Satu Mare
Sibiu	RO.SB	SB	RO33	RO126	55	397,322	5,432	2,097	Sibiu
Suceava	RO.SV	SV	RO34	RO215	72	634,810	8,553	3,302	Suceava
Teleorman	RO.TR	TR	RO35	RO317	14	380,123	5,790	2,236	Alexandria
Timiș	RO.TM	TM	RO36	RO424	30	683,540	8,697	3,358	Timișoara
Tulcea	RO.TL	TL	RO37	RO225	82	213,083	8,499	3,281	Tulcea
Vâlcea	RO.VL	VL	RO39	RO415	24	371,714	5,765	2,226	Râmnicu Vâlcea
Vaslui	RO.VS	VS	RO38	RO216	73	395,499	5,318	2,053	Vaslui
Vrancea	RO.VN	VN	RO40	RO226	62	340,310	4,857	1,875	Focșani
42 divisions						20,121,641	238,391	92,041
County: except Bucharest, which is a city. HASC: Hierarchical administrative subdivision codes. ISO: Codes from ISO 3166-2. FIPS: Codes from FIPS PUB 10-4. NUTS: Codes from Nomenclature for Statistical Territorial Units. Pc: First two digits of postal code for county (source [2]). Population: 2011-10-22 census. Area: Source is Romanian Statistical Yearbook 2001.

Postal codes: 

Romania uses six-digit postal codes (Coduri postale). The first two digits identify the county.

Further subdivisions:

The third character (first digit) in a county's NUTS code represents the macroregion to which it belongs; the macroregions are simply called one, two, three, and four. The first four characters of the NUTS code represent a region. This table lists the level-4 NUTS codes and their regions.

NUTS	Region	English
RO32	București - Ilfov	Bucharest - Ilfov
RO12	Centru	Center
RO21	Nord-Est	Northeast
RO11	Nord-Vest	Northwest
RO22	Sud-Est	Southeast
RO31	Sud - Muntenia	South - Muntenia
RO41	Sud-Vest Oltenia	Southwest - Oltenia
RO42	Vest	West

 

The counties are divided into orașe (towns), municipii (municipalities), and comune (communes). In ~2002, there were 169 towns, 96 municipalities, and 2,686 communes.

Territorial extent: 

Bucharest is surrounded by Ilfov.

The UN LOCODE page  for Romania lists locations in the country, some of them with their latitudes and longitudes, some with their ISO 3166-2 codes for their subdivisions. This information can be put together to approximate the territorial extent of subdivisions.

Origins of names: 

1. Banat: brief form of Banat of Temesvar; banat is a generic for the territory governed by a ban
2. Bistrița: Slavic for running brook
3. Brașov: Slavic for city of Braso (man's name)
4. Bucharest: attributed to founding by a shepherd named Bucur
5. Cluj: from Medieval Latin castrum clus: enclosed camp
6. Constanța: named for a sister of Roman emperor Constantine the Great
7. Galați: possibly from an early settlement of Galatians
8. Timișoara: Hungarian Temes: name of a county, var: fort

Change history: 

1. 1900: Romania consisted of three provinces: Dobruja, Moldavia, and Wallachia. Wallachia was split by the Olt River into Little Wallachia (or Lesser Wallachia, or Oltenia, to the west) and Great Wallachia (or Greater Wallachia, or Muntenia). Provinces were further subdivided into districts or departments, as follows (using modern spelling where possible):

District	Population	Area(km.²)	Province	Capital
Argeș	242,946	4,430	Muntenia	Pitești
Bacău	232,146	3,990	Moldavia	Bacău
Botoșani	197,118	3,160	Moldavia	Botoșani
Brăila	181,033	4,350	Muntenia	Brăila
Buzău	277,598	4,870	Muntenia	Buzău
Constanța	217,740	6,920	Dobruja	Constanța
Covurlui	171,710	2,950	Moldavia	Galați
Dîmbovița	258,367	3,470	Muntenia	Tîrgoviște
Dolj	437,517	6,580	Oltenia	Craiova
Dorohoi	184,357	2,820	Moldavia	Dorohoi
Falciu	108,324	2,200	Moldavia	Huși
Gorj	200,859	4,690	Oltenia	Tîrgu Jiu
Ialomița	242,611	6,790	Muntenia	Călărași
Iași	213,196	3,130	Moldavia	Iași
Ilfov	678,769	5,780	Muntenia	Bucharest
Mehedinți	295,548	4,950	Oltenia	Turnu Severin
Muscel	135,616	2,950	Muntenia	Cîmpulung
Neamț	169,794	3,990	Moldavia	Piatra
Olt	171,262	2,820	Muntenia	Slatina
Prahova	389,785	4,660	Muntenia	Ploești
Putna	181,103	3,240	Moldavia	Focșani
Roman	128,190	2,100	Moldavia	Roman
Rîmnicu-Sărat	164,166	3,260	Muntenia	Rîmnicu-Sărat
Rumanați	248,401	4,580	Oltenia	Caracal
Suceava	158,971	3,420	Moldavia	Fălticeni
Tecuci	142,993	2,540	Moldavia	Tecuci
Teleorman	296,759	4,690	Muntenia	Turnu-Măgurele
Tulcea	172,566	8,620	Dobruja	Tulcea
Tutova	129,858	2,380	Moldavia	Barlad
Vaslui	127,704	2,180	Moldavia	Vaslui
Vîlcea	231,572	4,250	Oltenia	Rîmnicu Vîlcea
Vlașka	259,482	4,480	Muntenia	Giurgiu
32 districts	7,248,061	131,240
Population: 1912-12-19 census

1. 1913-08-10: Southern Dobruja transferred from Bulgaria to Romania by the Treaty of Bucharest. This territory is now part of Razgrad and Varna regions in Bulgaria.
2. 1918-04-09: Romania annexed Bessarabia from Russia.
3. 1920-06-04: Treaty of Trianon redistributed more than half of Hungary's land. Romania received all of Transylvania, part of Banat, and Crișana-Maramureș. For details, see Hungary.
4. 1920-07-16: Bukovina transferred from Austria to Romania by the Treaty of Saint-Germain. Romania now contained nine provinces (Banat, Bessarabia, Bukovina, Crișana-Maramureș, Dobruja, Moldavia, Muntenia, Oltenia, and Transylvania), subdivided into about 76 counties or parts of counties.
5. 1925-06-14: Under law for administrative unification (Legea pentru unificarea administrativă), Romania was reorganized into 71 counties, which were further divided into 8,751 communes. The counties (source [1]) were:

County	Population	Area(km.²)	Capital
Alba	213,795	3,433	Alba-Iulia
Arad	423,824	6,248	Arad
Argeș	258,305	4,216	Curtea de Argeș
Bacău	260,781	4,410	Bacău
Baia	155,915	3,353	Fălticeni
Bălți	386,476	5,260	Bălți
Bihor	509,130	7,467	Oradea
Botoșani	216,537	3,077	Botoșani
Brașov	167,946	2,605	Brașov
Brăila	219,932	4,286	Brăila
Buzău	309,425	4,936	Buzău
Cahul	194,631	4,482	Cahul
Caliacra	166,588	4,500	Bazargic
Caraș	200,390	4,693	Oravița
Câmpulung	95,174	2,349	Câmpulung Bucovina
Cernăuți	305,097	1,771	Cernăuți
Cetatea Albă	340,459	7,595	Cetatea Albă
Ciuc	146,584	4,993	Miercurea Ciuc
Cluj	333,545	4,813	Cluj
Constanța	249,914	6,910	Constanța
Covurlui	211,196	2,662	Galați
Dâmbovița	310,310	3,440	Târgoviște
Dolj	487,047	6,538	Craiova
Dorohoi	209,248	2,846	Dorohoi
Durostor	211,439	3,226	Silistra
Făgăraș	86,461	2,432	Făgăraș
Fălciu	113,049	2,120	Huși
Gorj	208,099	4,579	Târgu Jiu
Hotin	395,345	3,782	Hotin
Hunedoara	331,677	7,695	Deva
Ialomița	295,500	7,095	Călărași
Iași	276,230	3,227	Iași
Ilfov	992,416	5,197	București
Ismail	224,229	4,212	Ismail
Lăpușna	421,857	4,181	Chișinău
Maramureș	162,158	3,381	Sighet
Mehedinți	306,339	5,320	Turnu Severin
Mureș	289,817	4,856	Târgu Mureș
Muscel	150,458	3,058	Câmpulung
Năsăud	145,423	4,326	Bistrița
Neamț	198,670	3,977	Piatra Neamț
Odorhei	130,646	2,977	Odorhei
Olt	184,219	2,863	Slatina
Orhei	277,009	4,246	Orhei
Prahova	478,007	5,040	Ploiești
Putna	193,738	3,340	Focșani
Rădăuți	161,865	2,360	Rădăuți
Râmnicu Sărat	185,110	3,324	Râmnicu Sărat
Roman	151,918	1,880	Roman
Romanați	271,288	3,560	Caracal
Satu Mare	295,131	4,242	Satu Mare
Sălaj	342,672	5,191	Zalău
Severin	240,715	6,422	Lugoj
Sibiu	193,309	3,531	Sibiu
Someș	220,353	3,965	Dej
Soroca	315,774	4,331	Soroca
Storojineț	169,518	2,653	Storojineț
Suceava	121,870	1,309	Suceava
Târnava Mare	148,798	2,836	Sighișoara
Târnava Mică	148,340	2,081	Blaj
Tecuci	157,079	2,408	Tecuci
Teleorman	348,027	4,577	Turnu Măgurele
Tighina	307,629	6,333	Tighina
Timiș Torontal	500,416	7,600	Timișoara
Trei Scaune	136,358	3,337	Sfântu Gheorghe
Tulcea	183,391	8,626	Tulcea
Turda	181,953	3,158	Turda
Tutova	144,267	2,498	Bârlad
Vaslui	138,870	2,260	Vaslui
Vâlcea	246,616	4,081	Râmnicu Vâlcea
Vlașca	296,616	4,494	Giurgiu
71 counties	18,052,896	295,049
Population: 1934 estimate

1. (Note: the columns in the above table don't quite add up to the totals given. The discrepancy occurs in the source. Modern spellings are used.)
2. 1940-06: Northern Bukovina ceded to Soviet Union by treaty.
3. 1940-08-20: Northern Transylvania ceded to Hungary.
4. 1940-09-07: Southern Dobruja ceded to Bulgaria.
5. 1947-02-10: Transylvanian territory restored to Romania from Hungary. Bessarabia, which had changed hands repeatedly during World War II, formally restored to the U.S.S.R.
6. 1950: Romania reorganized into rayons (districts), with groups of districts designated as provinces.
7. 1950: Names of Brașov province and its capital changed to Stalin.
8. 1960: Names of Stalin province and its capital changed back to Brașov.
9. ~1960: Constanța town split from Dobrogea province. The resulting division was:

Division	Population	Area(km.²)	Capital
Argeș	1,189,395	15,800	Pitești
Bacău	1,103,964	13,400	Bacău
Banat	1,241,832	21,800	Timișoara
Brașov	1,062,481	12,450	Brașov
Bucharest	1,681,599	18,700	Bucharest
Bucharest [city]	1,366,794	550	Bucharest
Cluj	1,217,401	18,000	Cluj
Constanța [town]	153,871		Constanța
Crișana	873,393	12,450	Oradea
Dobrogea	517,016	16,300	Constanța
Galați	1,065,646	14,800	Galați
Hunedoara	656,452	11,000	Deva
Iași	1,052,378	11,100	Iași
Maramureș	782,127	10,500	Baia Mare
Mureș-Magyar	814,632	13,500	Tîrgu Mureș
Oltenia	1,570,574	20,300	Craiova
Ploiești	1,460,693	13,100	Ploiești
Suceava	1,002,883	13,750	Suceava
18 divisions	18,813,131	237,500
Population: 1966 estimate

1. 1968-02-16: Romania reorganized. The 15 regions, one autonomous region, one regional town, and one republic town were abolished and replaced by 39 counties and the city of Bucharest.

County	Population	Capital
Alba	409,634	Alba Iulia
Arad	512,327	Arad
Argeș	631,910	Pitești
Bacău	667,712	Bacău
Bihor	633,082	Oradea
Bistrița-Năsăud	286,679	Bistrița
Botoșani	451,194	Botoșani
Brăila	377,940	Brăila
Brașov	582,858	Brașov
Bucharest	1,934,025	București
Buzău	508,387	Buzău
Caraș-Severin	385,617	Reșița
Cluj	715,409	Cluj
Constanța	608,825	Constanța
Covasna	199,051	Sfîntu Gheorghe
Dîmbovița	493,492	Tîrgoviște
Dolj	750,387	Craiova
Galați	581,569	Galați
Gorj	348,516	Tîrgu Jiu
Harghita	326,302	Miercurea Ciuc
Hunedoara	514,498	Deva
Ialomița	372,734	Slobozia
Iași	729,234	Iași
Ilfov	780,364	București
Maramureș	492,837	Baia Mare
Mehedinți	322,363	Turnu Severin
Mureș	605,380	Tîrgu Mureș
Neamț	532,096	Piatra Neamț
Olt	518,768	Slatina
Prahova	817,108	Ploiești
Sălaj	264,417	Zalău
Satu Mare	393,916	Satu Mare
Sibiu	481,612	Sibiu
Suceava	634,002	Suceava
Teleorman	523,049	Alexandria
Timiș	696,736	Timișoara
Tulcea	254,403	Tulcea
Vaslui	436,874	Vaslui
Vîlcea	414,380	Rîmnicu Vîlcea
Vrancea	369,729	Focșani
Total	21,559,416
County: except Bucharest municipality Population: 1977-01-05 census (provisional: source [9])

1. ~1973: Capitals of Cluj and Mehedinți renamed Cluj-Napoca and Drobeta-Turnu Severin, respectively.
2. 1981-01-23: Călărași county formed from parts of Ialomița and Ilfov counties. Giurgiu county formed from parts of Ilfov and Teleorman counties. Remainder of Ilfov county annexed to Bucharest municipality. Before this change, Ilfov county's FIPS code was RO24.

County	FIPS	Population	Area(km.²)	Area(mi.²)	Capital
Alba	RO01	408,457	6,231	2,406	Alba Iulia
Arad	RO02	482,144	7,652	2,954	Arad
Argeș	RO03	679,868	6,801	2,626	Pitești
Bacău	RO04	742,901	6,606	2,551	Bacău
Bihor	RO05	633,629	7,535	2,909	Oradea
Bistrița-Năsăud	RO06	328,786	5,305	2,048	Bistrița
Botoșani	RO07	462,370	4,965	1,917	Botoșani
Brăila	RO08	391,923	4,724	1,824	Brăila
Brașov	RO09	642,764	5,351	2,066	Brașov
Bucharest	RO10	2,339,156	1,820	703	Bucharest
Buzău	RO11	515,202	6,072	2,344	Buzău
Călărași	RO41	336,657	5,074	1,959	Călărași
Caraș-Severin	RO12	370,058	8,503	3,283	Reșița
Cluj	RO13	727,033	6,650	2,568	Cluj-Napoca
Constanța	RO14	747,441	7,055	2,724	Constanța
Covasna	RO15	232,951	3,705	1,431	Sfîntu Gheorghe
Dîmbovița	RO16	558,518	4,036	1,558	Tîrgoviște
Dolj	RO17	758,895	7,413	2,862	Craiova
Galați	RO18	642,983	4,425	1,709	Galați
Giurgiu	RO42	305,661	3,511	1,356	Giurgiu
Gorj	RO19	397,927	5,641	2,178	Tîrgu Jiu
Harghita	RO20	347,145	6,610	2,552	Miercurea-Ciuc
Hunedoara	RO21	547,180	7,016	2,709	Deva
Ialomița	RO22	305,454	4,449	1,718	Slobozia
Iași	RO23	815,368	5,469	2,112	Iași
Maramureș	RO25	539,718	6,215	2,400	Baia Mare
Mehedinți	RO26	330,017	4,900	1,892	Drobeta-Turnu Severin
Mureș	RO27	607,355	6,696	2,585	Tîrgu Mureș
Neamț	RO28	584,364	5,890	2,274	Piatra-Neamț
Olt	RO29	520,871	5,507	2,126	Slatina
Prahova	RO30	874,219	4,694	1,812	Ploiești
Sălaj	RO31	264,448	3,850	1,486	Zalău
Satu Mare	RO32	398,401	4,405	1,701	Satu Mare
Sibiu	RO33	448,474	5,422	2,093	Sibiu
Suceava	RO34	708,571	8,555	3,303	Suceava
Teleorman	RO35	477,527	5,760	2,224	Alexandria
Timiș	RO36	691,797	8,692	3,356	Timișoara
Tulcea	RO37	269,311	8,430	3,255	Tulcea
Vaslui	RO38	463,832	5,297	2,045	Vaslui
Vîlcea	RO39	436,989	5,705	2,203	Rîmnicu Vîlcea
Vrancea	RO40	394,257	4,863	1,878	Focșani
41 divisions		22,730,622	237,500	91,700
County: except Bucharest, which is a city. FIPS: Codes from FIPS PUB 10-4. Population: 1992-01-07 census

1. 1990-02-22: In spelling reform, î changed to â in the names of two counties (Dâmbovița, and Vâlcea) and five capital cities (Râmnicu Vâlcea, Sfântu Gheorghe, Târgu Jiu, Târgu Mureș, and Târgoviște). Sectorul Agricol Ilfov (Ilfov Agricultural Sector) split from Bucharest municipality as a local government with county rank, but remained subordinate to Bucharest.
2. 1997-05-09: Ilfov county split from Bucharest municipality (former HASC code RO.BU) to resume full county rank. The ISO code for Bucharest did not change.
3. 2007-01-01: Romania joined the European Union.

Other names of subdivisions: 

According to Wikipedia (source [4]), the Romanian Academy considers the letters ș and ț to be correct for writing Romanian, and not ş and ţ. The difference is whether the diacritical marks below the s and t are commas (correct) or cedillas (wrong). Apparently a lot of people are using cedillas.

Where the county name is the same as its capital, the German name of the capital (dating back to the Austro-Hungarian Empire) is given.

1. Bistrița: Bistritz (German)
2. Botoșani: Botoschani (German)
3. Brașov: Kronstadt (German); Stalin (obsolete)
4. Bucharest: Bucarest (French, Italian, Spanish); Bucareste (Portuguese); București (Romanian); Bukarest (Finnish, German, Swedish); Бухарест (Russian)
5. Bukovina: Bucovina (Italian, Portuguese, Spanish); Bucovine (French); Bukowina (German)
6. Călărași: Kalarasch (German)
7. Cluj: Klausenburg (German)
8. Constanța: Konstanza (German)
9. Dâmbovița: Dîmbovița (obsolete)
10. Dobruja: Dobrogea (Romanian); Dobroudja (French); Dobrudja (variant); Dobrudscha (German); Dobrugia (Italian)
11. Galați: Galatz (German)
12. Iași: Jassy (German)
13. Sibiu: Hermannstadt (German)
14. Transylvania: Siebenbürgen (German); Transilvania (Italian, Spanish); Transilvânia (Portuguese); Transylvanie (French)
15. Tulcea: Tultscha (German)
16. Vâlcea: Vîlcea (obsolete)
17. Wallachia: Valacchia (Italian); Valachie (French); Valaquia (Spanish); Valáquia (Portuguese); Walachei (German); Walachia (variant)

Population history:

County	1948-01-25	1956-02-21	1966-03-15	1977-01-05	1992-01-07	2002-03-18	2011-10-22
Alba	361,062	370,800	382,786	409,634	413,919	382,747	342,376
Arad	476,207	475,620	481,248	512,020	487,617	461,791	430,629
Argeș	448,964	483,741	529,833	631,918	681,206	652,625	612,431
Bacău	414,996	507,937	598,321	667,791	737,512	706,623	616,168
Bihor	536,323	574,488	586,460	633,094	638,863	600,246	575,398
Bistrița-Năsăud	233,650	255,789	269,954	286,628	326,820	311,657	286,225
Botoșani	385,236	428,050	452,406	451,217	461,305	452,834	412,626
Brăila	271,251	297,276	339,954	377,954	392,031	373,174	321,212
Brașov	300,836	373,941	442,692	582,863	643,261	589,028	549,217
Bucharest	1,025,180	1,177,661	1,366,684	1,807,239	2,067,545	1,926,334	1,883,425
Buzău	430,225	465,829	480,951	508,424	516,961	496,214	451,069
Călărași	287,722	318,573	337,261	338,807	338,804	324,617	306,691
Caraș-Severin	302,254	327,787	358,726	385,577	376,347	333,219	295,579
Cluj	520,073	580,344	629,746	715,507	736,301	702,755	691,106
Constanța	311,062	369,940	465,752	608,817	748,769	715,151	684,082
Covasna	157,166	172,509	176,858	199,017	233,256	222,449	210,177
Dâmbovița	409,272	438,985	453,241	527,620	562,041	541,763	518,745
Dolj	615,301	642,028	691,116	750,328	762,142	734,231	660,544
Galați	341,797	396,138	474,279	581,561	641,011	619,556	536,167
Giurgiu	313,793	325,045	320,120	327,494	313,352	297,859	281,422
Gorj	280,524	293,031	298,382	348,521	401,021	387,308	341,594
Harghita	258,495	273,964	282,392	326,310	348,335	326,222	310,867
Hunedoara	306,955	381,902	474,602	514,436	547,950	485,712	418,565
Ialomița	244,750	274,655	291,373	295,965	306,145	296,572	274,148
Iași	431,586	516,635	619,027	729,243	811,342	816,910	772,348
Ilfov	167,533	196,265	229,773	287,738	286,965	300,123	388,738
Maramureș	321,287	367,114	427,645	492,860	540,099	510,110	478,659
Mehedinți	304,788	304,091	310,021	322,371	332,673	306,732	265,390
Mureș	461,403	513,261	561,598	605,345	610,053	580,851	550,846
Neamț	357,348	419,949	470,206	532,096	578,420	554,516	470,766
Olt	442,442	458,982	476,513	518,804	523,291	489,274	436,400
Prahova	557,776	623,817	701,057	817,168	874,349	829,945	762,886
Sălaj	262,580	271,989	263,103	264,569	266,797	248,015	224,384
Satu Mare	312,672	337,351	359,393	393,840	400,789	367,281	344,360
Sibiu	335,116	372,687	414,756	481,645	452,873	421,724	397,322
Suceava	439,751	507,674	572,781	633,899	701,830	688,435	634,810
Teleorman	487,394	510,488	516,222	518,943	483,840	436,025	380,123
Timiș	588,936	568,881	607,596	696,884	700,033	677,926	683,540
Tulcea	192,228	223,719	236,709	254,531	270,997	256,492	213,083
Vâlcea	341,590	362,356	368,779	414,241	438,388	413,247	371,714
Vaslui	344,917	401,626	431,555	437,251	461,374	455,049	395,499
Vrancea	290,183	326,532	351,292	369,740	393,408	387,632	340,310
Total	15,872,624	17,489,450	19,103,163	21,559,910	22,810,035	21,680,974	20,121,641

Sources: 

1. [1] Nistor, Ioan Silviu. Comuna Și Județul: Evoluția Istorică. Dacia, Cluj Napoca, 2000.
2. [2] Euroticket Company  used to have postal code information (retrieved 2007-07-30).
3. [3] Institutul National de Statistica  had data from censuses up to 2002 (http://www.insse.ro/RPL2002INS/vol5/tables/t01.pdf, dead link, retrieved 2005-07-26). Populations were corrected to reflect county boundaries as of 2002.
4. [4] Romanian alphabet  Wikipedia article (retrieved 2011-06-20).
5. [5] Bennett, Robert, ed. "Territory and Administration in Europe." Pinter Publishers, London, New York, 1989.
6. [6] "Eastern Europe and the Commonwealth of Independent States 1992." Europa Publications, London, 1992.
7. [7] "Anuarul Statistic al Republicii Socialiste România 1981." Direcția Centrală de Statistică.
8. [8] Magocsi, Paul Robert. "Historical Atlas of Central Europe." University of Washington Press, Seattle, 2002.
9. [9] 1979 Demographic Yearbook , 31st Ed. Statistical Office, United Nations, New York, 1980 (retrieved 2011-12-28).
10. [10] Recensământul Populației și al Locuințelor  (2011 census). Institutul Național de Statistică (retrieved 2013-07-26).