Updates: 
Sorin Cosoveanu found the website with 2010 census data, which I have added to the table.
FIPS 10-4 Change Notice 12, dated 2007-06-11, has FIPS codes for the new governorates. The table has been updated accordingly.
It uses different Arabic names for some of the divisions, which I report as variants under "Other names of subdivisions".
ISO 3166-2 Newsletter I-8, published on 2007-04-17, shows ISO governorate codes for the new administrative structure of Bahrain.
They are shown in the table below.
Country overview: 
| Short name | BAHRAIN |
| ISO code | BH |
| FIPS code | BA |
| Language | Arabic (ar) |
| Time zone | +3 |
| Capital | Manama |
Bahrain was a British protectorate until 1971-08-15, when it became independent.
Other names of country: 
- Arabic: Dawlat al-Bahrayn (formal)
- Danish: Bahrain
- Dutch: Bahrein
- English: State of Bahrain (formal)
- Finnish: Bahrain
- French: Bahreïn m
- German: Bahrain n
- Icelandic: Barein
- Italian: Bahrein, Bahrain m
- Norwegian: Bahrain, Staten Bahrain (formal)
- Portuguese: Bahrein, Barém (variant-Portugal), Barein (variant-Brazil), Estado m do Bahrain m (formal)
- Russian: Королевство Бахрейн (formal)
- Spanish: Bahréin, Bahráin, Estado m de Bahréin (formal)
- Swedish: Bahrain
- Turkish: Bahreyn Devleti (formal)
Origin of name: 
Arabic al-bahrayn: the two seas
Primary subdivisions: 
Bahrain is divided into five governorates.
| Division | HASC | ISO | FIPS | Pop-2010 | Pop-2001 | Arabic |
| Capital | BH.CA | 13 | BA16 | 329,510 | 163,696 | Al Manamah |
| Central | BH.CE | 16 | BA19 | 326,305 | 167,691 | Al Wusta |
| Muharraq | BH.MU | 15 | BA15 | 189,114 | 103,576 | Al Muharraq |
| Northern | BH.NO | 17 | BA18 | 276,949 | 166,824 | Ash Shamaliyah |
| Southern | BH.SO | 14 | BA17 | 101,456 | 44,764 | Al Janubiyah |
| 5 governorates | 1,234,571 | 650,604 | |
- HASC: Hierarchical administrative subdivision codes.
- ISO: Codes from ISO 3166-2.
- FIPS: Codes from FIPS PUB 10-4.
- Pop-2010: 2010-04-27 census. Total includes 11,237
with governorate "not stated."
- Pop-2001: 2001-04-07 census. Total includes 4,053
Bahrainis living abroad.
|
Further subdivisions:
Each of the governorates is divided into ten constituencies.
Territorial extent: 
Bahrain consists entirely of islands in the Gulf of Bahrain, an arm of the Persian Gulf. The largest is Bahrain itself.
Near it are Al Muharraq, Sitrah, and Umm Nasan, all connected to it by causeways. Just off the coast of Qatar is Hawar Island
and some neighboring islets. Qatar also claims this group.
Origins of names: 
- Al Manamah: Arabic al-manama the place of dreams
- Al Mintaqah al Gharbiyah: = Western Region
- Al Mintaqah al Wusta: = Central Region
- Al Mintaqah ash Shamaliyah: = Northern Region
- Ar Rifa` wa al Mintaqah al Janubiyah: = Rifaa and Southern Region
- Madinat Hamad: = Hamad Town
- Madinat `Isa: = Isa Town
- Mintaqat Juzur Hawar: = Hawar Islands Region
Change history: 
- 1960: Bahrain consisted of four municipalities: Al Hadd, Al Manamah, Al Muharraq, and Ar Rifa`.
- 1971-08-15: Bahrain became independent. It then had six municipalities: Al Hadd, Ar Rifa` al Gharbi, Judd Hafs,
Manamah, Muharraq, and Sitrah. By ~1984, their status had changed from municipalities to manaṭiq (sing. minṭaqah:
regions), and three new regions had split off.
- ~1985: Al Hadd split from Al Muharraq.
- ~1988: Madinat `Isa split from Al Mintaqah al Wusta.
- ~1991: Madinat Hamad split from Ar Rifa` wa al Mintaqah al Janubiyah. At this point, the regions were as shown below.
| Division | HASC | ISO | FIPS | 2001 | 1991 | 1971 | Area(km.²) | Area(mi.²) | Capital | Governorate(s) |
| Al Hadd | BH.HD | 01 | BA01 | 11,637 | 8,610 | 5,300 | 11 | 4 | Al Hadd | Muharraq |
| Al Manamah | BH.MN | 03 | BA02 | 153,395 | 136,999 | 89,400 | 27 | 10 | Manama | Capital |
| Al Mintaqah al Gharbiyah | BH.MG | 10 | BA08 | 26,149 | 22,034 | 8,700 | 157 | 61 | | Northern, Southern |
| Al Mintaqah al Wusta | BH.MW | 07 | BA11 | 49,969 | 34,304 | 6,700 | 35 | 14 | | Central, Northern |
| Al Mintaqah ash Shamaliyah | BH.MS | 05 | BA10 | 43,691 | 33,763 | 10,600 | 37 | 14 | | Northern |
| Al Muharraq | BH.MQ | 02 | BA03 | 91,939 | 74,245 | 44,200 | 21 | 8 | Al Muharraq | Muharraq |
| Ar Rifa` wa al Mintaqah al Janubiyah | BH.RF | 09 | BA13 | 79,985 | 49,752 | 12,600 | 292 | 113 | Ar Rifa al Gharbi | Southern, Central |
| Jidd Hafs | BH.JH | 04 | BA05 | 52,450 | 44,769 | 19,500 | 24 | 9 | Jidd Hafs | Northern, Capital |
| Madinat Hamad | BH.MH | 12 | BA14 | 52,718 | 29,055 | | 13 | 5 | | Northern |
| Madinat `Isa | BH.MI | 08 | BA12 | 36,833 | 34,509 | 7,500 | 12 | 5 | | Central |
| Mintaqat Juzur Hawar | BH.MJ | 11 | BA09 | 3,875 | 3,242 | | 52 | 20 | | Southern |
| Sitrah | BH.ST | 06 | BA06 | 43,910 | 36,755 | 11,300 | 29 | 11 | Sitrah | Central |
| 12 regions | 650,604 | 508,037 | 215,800 | 712 | 275 | | |
- HASC: Hierarchical administrative subdivision codes.
- ISO: Codes from ISO 3166-2.
- FIPS: Codes from FIPS PUB 10-4.
- 2001, 1991, 1971: Populations according to the censuses of 2001-04-07, 1991-11-16, 1971-04-03.
The total
for the 2001 census includes 4,053 Bahrainis living abroad.
- Governorate(s): Governorates formed from each region, starting with the largest section.
There may be some
small slivers of territory not accounted for.
|
- 2002-07-03: Decree-Law No. 17 for 2002 replaced the ten divisions with five governorates.
Postal codes are three or four digits. They consist of the ISO region code followed by two additional digits, with the leading
zero suppressed.
Other names of subdivisions: 
- Al Hadd: Hedd, Hidd (variant)
- Al Manamah: Al `Asimah, Manama (variant)
- Al Mintaqah al Wusta: Al Wasat (variant); Central (English)
- Ar Rifa` wa al Mintaqah al Janubiyah: Rifaa, Rifa'a, Riffa, Rufaa (variant)
- Jidd Hafs: Jidhafs, Judd Hafs (variant)
- Mintaqat Juzur Hawar: Eastern, Huwar Islands, Howar Islands (English); Ash Sharqiyah (variant)
- Sitrah: Sitra (variant)
Sources: 
- [1] Population by Governorate, Nationality
and Sex - 2010 Census
. Kingdom of Bahrain Central Informatics Organisation (retrieved 2012-07-07).
- [2] Decree-Law No. (17) for 2002
(retrieved 2003-11-23).
- [3] Bahrain in Figures 1999, http://www.bahrain.gov.bh/english/stats/BFigures/99/index.asp had 1991 census data (dead link, retrieved
2002-10-27).
- [4] Bahrain in Figures 2000, http://www.bahrain.gov.bh/pdfs/bf2000.pdf had 2001 census data (dead link, retrieved 2002-10-27).