Siikajoki
| Siikajoki | |
|---|---|
| Municipality | |
| Siikajoen kunta Siikajoki kommun | |
| Location of Siikajoki in Finland | |
| Coordinates: 64°40′N 025°06′E / 64.667°N 25.100°E | |
| Country | Finland | 
| Region | North Ostrobothnia | 
| Sub-region | Raahe | 
| Charter | 1868 | 
| Seat | Ruukki | 
| Government | |
| • Municipality manager | Kaisu Tuomi | 
| Area  (2018-01-01) | |
|  • Total | 1,653.89 km2 (638.57 sq mi) | 
| • Land | 1,055.46 km2 (407.52 sq mi) | 
| • Water | 601.94 km2 (232.41 sq mi) | 
| • Rank | 74th largest in Finland | 
| Population  (2025-03-31) | |
|  • Total | 4,797 | 
| • Rank | 170th largest in Finland | 
| • Density | 4.54/km2 (11.8/sq mi) | 
| Population by native language | |
| • Finnish | 98.1% (official) | 
| • Others | 1.9% | 
| Population by age | |
| • 0 to 14 | 21.2% | 
| • 15 to 64 | 54.1% | 
| • 65 or older | 24.7% | 
| Time zone | UTC+02:00 (EET) | 
| • Summer (DST) | UTC+03:00 (EEST) | 
| Website | www | 
Siikajoki is a municipality of Finland. It is part of the North Ostrobothnia region. The municipality has a population of 4,797 (31 March 2025) and covers an area of 1,653.89 square kilometres (638.57 sq mi) of which 601.94 km2 (232.41 sq mi) is water. The population density is 4.54 inhabitants per square kilometre (11.8/sq mi). Neighbour municipalities are Hailuoto, Liminka, Lumijoki, Raahe and Siikalatva.
The municipality is unilingually Finnish.