Pieksämäki is a town in Southern Savonia, Finland. In Finland it is called a city. As of January 2014, almost 19,300 people lived there. Neighbouring municipalities are Hankasalmi, Joroinen, Juva, Kangasniemi, Leppävirta, Mikkeli, Rautalampi and Suonenjoki. Most people speak Finland.
Pieksämäki was established in 1930. It became a city in 1962.
The former municipality of Pieksänmaa was merged with Pieksämäki in 2007.