Hirvensalmi is a municipality of Finland.

It is located in the South Savo region. The municipality has a population of and covers an area of {{Data Finland municipality/total area Hirvensalmi|km2}} ofwhich {{Data Finland municipality/waters area Hirvensalmi|km2|abbr=on}}is water. The population density is{{Data Finland municipality/population density Hirvensalmi|PD/km2}}.