| En Name: | Agin-Buryat Autonomous Okrug |
| Ru Name: | Агинский-Бурятский автономный о́круг |
| Federal Subject: | Zabaykalsky Krai |
| Adm Ctr Name: | Aginskoye |
| Mun Data As Of: | January 2015 |
| Established Date: | 2008 |
Agin-Buryat Okrug (Russian: Аги́нский Буря́тский о́круг; Buriat: Агын Буряадай тойрог, Agyn Buryaaday Toyrog), or Aga Buryatia, is an administrative division of Zabaykalsky Krai, Russia.[1] It was a federal subject of Russia (an autonomous okrug of Chita Oblast) until it merged with Chita Oblast to form Zabaykalsky Krai on March 1, 2008. Prior to the merger, it was called Agin-Buryat Autonomous Okrug (Russian: Аги́нский Буря́тский автоно́мный о́круг). Its administrative center is the urban-type settlement of Aginskoye. It is one of the two Buryat okrugs in Russia, the other one is Ust-Orda Buryat Okrug of Irkutsk Oblast.
Source: Russian Federal State Statistics Service
| Average population (x 1000) | Live births | Deaths | Natural change | Crude birth rate (per 1000) | Crude death rate (per 1000) | Natural change (per 1000) | Fertility rates | ||
|---|---|---|---|---|---|---|---|---|---|
| 1970 | 66 | 1 699 | 451 | 1 248 | 25.7 | 6.8 | 18.9 | ||
| 1975 | 68 | 1 881 | 541 | 1 340 | 27.7 | 8.0 | 19.7 | ||
| 1980 | 70 | 2 035 | 686 | 1 349 | 29.1 | 9.8 | 19.3 | ||
| 1985 | 75 | 2 259 | 638 | 1 621 | 30.1 | 8.5 | 21.6 | ||
| 1990 | 71 | 1 868 | 604 | 1 264 | 26.5 | 8.6 | 17.9 | ||
| 1991 | 71 | 1 647 | 591 | 1 056 | 23.1 | 8.3 | 14.8 | ||
| 1992 | 72 | 1 518 | 655 | 863 | 20.9 | 9.0 | 11.9 | ||
| 1993 | 73 | 1 435 | 759 | 676 | 19.6 | 10.4 | 9.2 | 2.76 | |
| 1994 | 73 | 1 429 | 864 | 565 | 19.6 | 11.8 | 7.7 | 2.72 | |
| 1995 | 72 | 1 338 | 738 | 600 | 18.5 | 10.2 | 8.3 | 2.57 | |
| 1996 | 71 | 1 174 | 765 | 409 | 16.4 | 10.7 | 5.7 | 2.30 | |
| 1997 | 71 | 1 115 | 698 | 417 | 15.7 | 9.8 | 5.9 | 2.19 | |
| 1998 | 71 | 1 182 | 722 | 460 | 16.6 | 10.1 | 6.5 | 2.29 | |
| 1999 | 71 | 1 163 | 771 | 392 | 16.3 | 10.8 | 5.5 | 2.22 | |
| 2000 | 71 | 1 098 | 838 | 260 | 15.4 | 11.8 | 3.6 | 2.08 | |
| 2001 | 71 | 1 171 | 841 | 330 | 16.4 | 11.8 | 4.6 | 2.21 | |
| 2002 | 72 | 1 197 | 886 | 311 | 16.6 | 12.3 | 4.3 | 2.26 | |
| 2003 | 73 | 1 229 | 840 | 389 | 16.9 | 11.6 | 5.4 | 2.28 | |
| 2004 | 73 | 1 222 | 900 | 322 | 16.8 | 12.4 | 4.4 | 2.20 | |
| 2005 | 73 | 1 234 | 901 | 333 | 16.9 | 12.3 | 4.6 | 2.12 | |
| 2006 | 73 | 1 330 | 885 | 445 | 18.1 | 12.0 | 6.1 | 2.17 | |
| 2007 | 74 | 1 543 | 817 | 726 | 20.9 | 11.0 | 9.8 | 2.43 | |
| 2008 | 75 | 1 732 | 770 | 962 | 23.2 | 10.3 | 12.9 | 2.64 | |
| 2009 | 76 | 1 739 | 729 | 1 010 | 23.0 | 9.6 | 13.3 | 2,63 | |
| 2010 | 77 | 1 837 | 729 | 1 108 | 23.9 | 9.5 | 14.4 | 2.71 |
While residents of the autonomous okrug (as of the 2020 census) identified themselves as belonging to 54 different ethnic groups, most of them consider themselves either Buryats (65.3%) or ethnic Russians (33.2%), the Tatars at 390 (0.5%) ending up as a distant third most numerous group in the region.
| Ethnic group | 1959 census | 1970 census | 1979 census | 1989 census | 2002 census | 2010 census | 2020 census | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number | % | Number | % | Number | % | Number | % | Number | % | Number | % | Number | % | ||
| Buryats | 23,374 | 47.6% | 33,117 | 50.4% | 35,868 | 52.0% | 42,362 | 54.9% | 45,149 | 62.5% | 50,125 | 65.1% | 45,242 | 65.3% | |
| Russians | 23,857 | 48.6% | 28,966 | 44.0% | 29,098 | 42.1% | 31,473 | 40.8% | 25,366 | 35.1% | 25,079 | 32.5% | 22,988 | 33.2% | |
| Others | 1,878 | 3.8% | 3,685 | 5.6% | 4,069 | 5.9% | 3,353 | 4.3% | 1,698 | 2.4% | 1,838 | 2.4% | 1,021 | 1.5% | |