It is located in the province of Lapland and is part of the Lappi region. The municipality has a population of 22456 and covers an area of 1227,09 km² of which 43,85 km² is water. The population density is 18,724 inhabitants per km². It borders to the Swedish municipality of Haparanda.
The municipality is unilingually Finnish.
See also: Municipalities of Lapland, Övertorneå, Sweden