| En Name: | Krasnooktyabrsky |
| Ru Name: | Краснооктябрьский |
| Loc Lang1: | Meadow Mari |
| Loc Lang2: | Hill Mari |
| Coordinates: | 56.6833°N 87°W |
| Map Label Position: | bottom |
| Federal Subject: | Mari El Republic |
| Adm District Jur: | Medvedevsky District |
| Adm Selsoviet Jur: | Krasnooktyabrsky Urban-Type Settlement |
| Adm Selsoviet Type: | Urban-type settlement |
| Adm Ctr Of: | Krasnooktyabrsky Urban-Type Settlement |
| Inhabloc Cat: | Urban-type settlement |
| Mun District Jur: | Medvedevsky Municipal District |
| Urban Settlement Jur: | Krasnooktyabrsky Urban Settlement |
| Mun Admctr Of: | Krasnooktyabrsky Urban Settlement |
| Pop 2010Census: | 4559 |
| Postal Codes: | 425202 |
| Krasnooktyabrsky population | |
| Label1: | 2010 Census |
| Data1: | 4,559 |
| Label2: | 2002 Census |
| Data2: | 4,307 |
| Label3: | 1989 Census |
| Data3: | 4,479 |
| Label4: | 1979 Census |
| Data4: | 3,809 |
Krasnooktyabrsky (Russian: Краснооктя́брьский) is an urban locality (an urban-type settlement) in Medvedevsky District of the Mari El Republic, Russia. As of the 2010 Census, its population was 4,559.
Within the framework of administrative divisions, the urban-type settlement of Krasnooktyabrsky is incorporated within Medvedevsky District as Krasnooktyabrsky Urban-Type Settlement[1] (an administrative division of the district).[2] As a municipal division, Krasnooktyabrsky Urban-Type Settlement is incorporated within Medvedevsky Municipal District as Krasnooktyabrsky Urban Settlement.[3]