| En Name: | Lagansky District |
| Ru Name: | Лаганский район |
| Loc Name1: | Лаганя район |
| Loc Lang1: | Kalmyk |
| Image View: | Buddhist temple in Djalykovo, Kalmykia, Russia 01.jpg |
| Coordinates: | 45.3833°N 69°W |
| Image Coa: | Lagan.gif |
| Federal Subject: | Republic of Kalmykia |
| Adm Data As Of: | June 2011 |
| Adm Ctr Type: | town |
| Adm Ctr Name: | Lagan |
| Town Of District Significance Type: | Towns |
| No Of Towns Of District Significance: | 1 |
| Selsoviet Type1: | Rural administrations |
| No Of Selsoviets Type1: | 3 |
| No Of Cities Towns: | 1 |
| No Of Rural Localities: | 5 |
| Mun Data As Of: | March 2015 |
| Mun Formation1: | Lagansky Municipal District |
| Mun Formation1 No Of Urban Settlements: | 1 |
| Mun Formation1 No Of Rural Settlements: | 4 |
| Area As Of: | June 2011 |
| Area Km2: | 4685.51 |
| Pop 2010Census: | 20089 |
| Urban Pop 2010Census: | 71.3% |
| Rural Pop 2010Census: | 28.7% |
| Established Date: | 1935 |
| Prev Name1: | Kaspiysky District |
| Prev Name1 Date: | 1995 |
| Website: | http://www.85215.ru/ |
| Date: | April 2013 |
| Population of Lagansky District | |
| Label1: | 2010 Census |
| Data1: | 20,089 |
| Label2: | 2002 Census |
| Data2: | 20,007 |
| Label3: | 1989 Census |
| Data3: | 23,651 |
| Label4: | 1979 Census |
| Data4: | 22,193 |
Lagansky District (Russian: Лага́нский райо́н; Kalmyk; Oirat: Лаганя район, Laganya rayon) is an administrative[1] and municipal[2] district (raion), one of the thirteen in the Republic of Kalmykia, Russia. It is located in the southeast of the republic. The area of the district is 4685.51km2. Its administrative center is the town of Lagan. As of the 2010 Census, the total population of the district was 20,089, with the population of Lagan accounting for 71.3% of that number.
The district was established in 1935. Until 1995, it was called Kaspiysky (Russian: Russian: Каспи́йский райо́н, lit. "Caspian"; Kalmyk: Kalmyk; Oirat: Каспийск район, Kaspijsk rajon).
Within the framework of administrative divisions, Lagansky District is one of the thirteen in the Republic of Kalmykia. It is divided into one town (an administrative division with the administrative center in the town (an inhabited locality) of Lagan) and three rural administrations, which comprise five rural localities. As a municipal division, the district is incorporated as Lagansky Municipal District. The Town of Lagan is incorporated as an urban settlement, and the three rural administration are incorporated as four rural settlements within the municipal district. The town of Lagan serves as the administrative center of both the administrative and municipal district.