| Tohmajärvi | |
| Official Name: | Finnish: Tohmajärven kunta Swedish: Tohmajärvi kommun |
| Settlement Type: | Municipality |
| Image Alt: | center of Tohmajärvi |
| Coordinates: | 62.2333°N 50°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Finland |
| Subdivision Type1: | Region |
| Subdivision Name1: | North Karelia |
| Subdivision Type2: | Sub-region |
| Subdivision Name2: | Central Karelia |
| Seat: | Kemie |
| Leader Title: | Municipal manager |
| Leader Name: | Olli Riikonen |
| Established Title: | Charter |
| Established Date: | 1869 |
| Timezone: | EET |
| Utc Offset: | +02:00 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +03:00 |
| Website: | www.tohmajarvi.fi |
Tohmajärvi (in Finnish pronounced as /ˈtohmɑˌjærʋi/) is a municipality of Finland. It is located in the North Karelia region. The municipality has a population of [1] and covers an area of NaNTohmajärvi}} ofwhich NaNTohmajärvi}}is water. The population density isNaNTohmajärvi. The municipality is unilingually Finnish.
Neighbouring municipalities are Joensuu, Kitee and Rääkkylä. The municipality of Värtsilä was consolidated with Tohmajärvi in 2005. Sortavala, a town in the Karelia, Russia, is located south of Tohmajärvi.
Tohmajärvi is located along the Blue Highway, which is an international tourist route from Mo i Rana, Norway to Pudozh, Russia via Sweden. The border crossing to Russia, Niirala, is in Värtsilä, now part of Tohmajärvi.
One of the most significant highways in Tohmajärvi is Highway 9, which runs west through Joensuu, Kuopio, Jyväskylä and Tampere to Turku. The Blue Highway follows this highway to Tohmajärvi.