| Polvijärvi | |
| Official Name: | Finnish: Polvijärven kunta Swedish: Polvijärvi kommun |
| Settlement Type: | Municipality |
| Coordinates: | 62.855°N 51°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Finland |
| Subdivision Type1: | Region |
| Subdivision Name1: | North Karelia |
| Subdivision Type2: | Sub-region |
| Subdivision Name2: | Joensuu sub-region |
| Leader Title: | Municipal manager |
| Leader Name: | Pauli Vaittinen |
| Established Title: | Charter |
| Established Date: | 1876 |
| Timezone: | EET |
| Utc Offset: | +02:00 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +03:00 |
| Website: | www.polvijarvi.fi |
Polvijärvi (pronounced as /fi/; literally "knee lake") is a municipality of Finland. It is located in the North Karelia region. The municipality has a population of and covers an area of NaNPolvijärvi}} of which NaNPolvijärvi}} is water. The population density is NaNPolvijärvi. Neighbouring municipalities are Juuka, Kaavi, Kontiolahti, Liperi, Outokumpu.
The municipality is unilingually Finnish.
Polvijärvi is established in 1876.