| Sēja Municipality | |
| Native Name: | Sējas novads |
| Native Name Lang: | lv |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Established Title: | Formed |
| Established Date: | 2006 |
| Seat Type: | Centre |
| Seat: | Loja |
| Leader Title: | Council Chair |
| Leader Name: | Guntis Liepiņš |
| Leader Party: | Fatherland/LRA |
| Population Density Km2: | auto |
| Postal Code Type: | Postal code |
Sēja Municipality (Latvian: Sējas novads) was a former municipality in Vidzeme, Latvia. The municipality was formed in 2006 by reorganization of Sēja Parish; the administrative centre being Loja. The population in 2020 was 2,156.[1]
On 1 July 2021, Sēja Municipality ceased to exist and its territory was merged into Saulkrasti Municipality as Sēja Parish.[2]