Koillismaa
| Koillismaa Koillismaan seutukunta | |
|---|---|
| Country | Finland | 
| Region | Northern Ostrobothnia | 
| Capital | Kuusamo | 
| Population  (2011) | |
|  • Total | 20,843 | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
Koillismaa (lit. 'Northeast Land') is a subdivision of Northern Ostrobothnia and one of the sub-regions of Finland since 2009.