| Siikainen | |
| Official Name: | Finnish: Siikaisten kunta Swedish: Siikais kommun |
| Other Name: | Siikais |
| Settlement Type: | Municipality |
| Coordinates: | 61.8833°N 70°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Finland |
| Subdivision Type1: | Region |
| Subdivision Name1: | Satakunta |
| Subdivision Type2: | Sub-region |
| Subdivision Name2: | Northern Satakunta sub-region |
| Leader Title: | Municipality manager |
| Leader Name: | Heli Kaskiluoto |
| Established Title: | Charter |
| Established Date: | 1871 |
| Blank3 Name: | Climate |
| Blank3 Info: | Dfc |
| Timezone: | EET |
| Utc Offset: | +02:00 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +03:00 |
| Website: | www.siikainen.fi |
Siikainen (sv|Siikais) is a municipality of Finland.
It is located in the former province of Western Finland and is part of the Satakunta region. The municipality has a population of, which make it the smallest municipality in Satakunta in terms of population. The municipality covers an area of NaNSiikainen}} of which NaNSiikainen}} is inland water . The population density is NaNSiikainen}}/{{Data Finland municipality/land area . The municipal manager of Siikainen is Heli Kaskiluoto.
The municipality is unilingually Finnish.
Siikainen hosts a buddhist center Samje and the northernmost Stupa in the world.[1]