| En Name: | Chainsky District |
| Ru Name: | Чаинский район |
| Image View: | Трасса Р398c.jpg |
| Coordinates: | 57.7833°N 121°W |
| Image Coa: | RUS Чаинский район COA.png |
| Federal Subject: | Tomsk Oblast |
| Adm Data As Of: | November 2014 |
| Adm Ctr Type: | selo |
| Adm Ctr Name: | Podgornoye |
| No Of Rural Localities: | 36 |
| Mun Data As Of: | November 2014 |
| Mun Formation1: | Chainsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 0 |
| Mun Formation1 No Of Rural Settlements: | 4 |
| Area Km2: | 7242 |
| Pop 2010Census: | 12920 |
| Urban Pop 2010Census: | 0% |
| Rural Pop 2010Census: | 100% |
| Website: | http://chainsk.tom.ru |
| Date: | March 2013 |
Chainsky District (Russian: Ча́инский райо́н) is an administrative[1] and municipal[2] district (raion), one of the sixteen in Tomsk Oblast, Russia. It is located in the center of the oblast. The area of the district is 7242km2.[3] Its administrative center is the rural locality (a selo) of Podgornoye. Population: 12,920 (2010 Census); The population of Podgornoye accounts for 38.6% of the district's total population.