Ristiina (Finnish: [ˈristiːnɑ]; in Swedish also known as Kristina) was a municipality of Finland.

It was founded in 1649 and it was named after Kristina Stenbock, the wife of Governor General and Count Per Brahe.

From the beginning of the year 2013 Ristiina is a part of Mikkeli city.

Ristiina is located in the province of Eastern Finland and is part of the Southern Savonia region.

The Pellosniemi division, which included modern Ristiina, had its center in the village of Olkkolanniemi.