| En Name: | Bayandayevsky District |
| Ru Name: | Баяндаевский район |
| Image View: | Баяндай - panoramio.jpg |
| Coordinates: | 53.0667°N 135°W |
| Image Coa: | Coat of Arms of Bayandayevski rayon (Irkutsk oblast).gif |
| Federal Subject: | Irkutsk Oblast |
| Adm Data As Of: | December 2013 |
| Adm Ctr Type: | selo |
| Adm Ctr Name: | Bayanday |
| No Of Rural Localities: | 49 |
| Counts Ref: | [1] |
| Mun Data As Of: | December 2004 |
| Mun Formation1: | Bayandayevsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 0 |
| Mun Formation1 No Of Rural Settlements: | 12 |
| Mun Formation1 Counts Ref: | [2] |
| Area Km2: | 3756.2 |
| Pop 2010Census: | 11529 |
| Urban Pop 2010Census: | 0% |
| Rural Pop 2010Census: | 100% |
| Website: | http://bayanday.irkobl.ru/ |
| Date: | February 2013 |
Bayandayevsky District (Russian: Баянда́евский райо́н; Buriat: Баяндайн аймаг, Baiandain aimag) is an administrative district of Ust-Orda Buryat Okrug of Irkutsk Oblast, Russia, one of the thirty-three in the oblast.[3] Municipally, it is incorporated as Bayandayevsky Municipal District.[4] It is located in the south of the oblast. The area of the district is 3756.2km2.[5] Its administrative center is the rural locality (a selo) of Bayanday.[6] Population: 13,730 (2002 Census); The population of Bayanday accounts for 23.2% of the district's total population.