| En Name: | Kalachyovsky District |
| Ru Name: | Калачёвский район |
| Image View: | НикЧудо (1).JPG |
| Coordinates: | 48.6833°N 75°W |
| Image Coa: | Coat of arms of Kalachyovsky district 2007 01 (official).png |
| Federal Subject: | Volgograd Oblast |
| Adm Data As Of: | 2016 |
| Adm Ctr Type: | town |
| Adm Ctr Name: | Kalach-na-Donu |
| Town Of District Significance Type: | Towns of district significance |
| No Of Towns Of District Significance: | 1 |
| Selsoviet Type1: | Selsoviets |
| No Of Selsoviets Type1: | 12 |
| No Of Cities Towns: | 1 |
| No Of Rural Localities: | 46 |
| Mun Data As Of: | April 2007 |
| Mun Formation1: | Kalachyovsky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 1 |
| Mun Formation1 No Of Rural Settlements: | 12 |
| Area Km2: | 4200 |
| Pop 2010Census: | 58524 |
| Urban Pop 2010Census: | 46.0% |
| Rural Pop 2010Census: | 54.0% |
| Established Date: | 1928 |
| Website: | http://kalachadmin.ru |
| Date: | August 2017 |
| Population of Kalachyovsky District | |
| Label1: | 2021 Census |
| Data1: | 47,566 |
| Label2: | 2010 Census |
| Data2: | 58,524 |
| Label3: | 2002 Census |
| Data3: | 62,228 |
| Label4: | 1989 Census |
| Data4: | 53,058 |
| Label5: | 1979 Census |
| Data5: | 53,549 |
Kalachyovsky District (ru|Калачёвский райо́н) is an administrative[1] district (raion), one of the thirty-three in Volgograd Oblast, Russia. As a municipal division, it is incorporated as Kalachyovsky Municipal District.[2] It is located in the south of the oblast. The area of the district is 4200km2.[3] Its administrative center is the town of Kalach-na-Donu. As of the 2021 Census, the total population of the district was 47,566, with the population of Kalach-na-Donu accounting for 37,1% of that number.
The district was established in 1928 within Lower Volga Krai.[4] When Lower Volga Krai was split into Stalingrad and Saratov Krais in 1934, the district remained a part of the former. In 1936, Stalingrad Krai was transformed into Stalingrad Oblast, which was renamed Volgograd Oblast in 1961.