Puula (or Puulavesi) is a lake in the Kymi River area in the Finnish municipalities of Hirvensalmi, Kangasniemi and Mikkeli.

Puula is 94.7 metres (311 ft) above sea level, with a surface area of 331 square kilometres (128 sq mi).

It is 62 metres (203 ft) deep at its deepest point, located near Porttisalmi at Simpiänselkä, which is the biggest open area of the lake.

Water from lake Puula runs down to Vahvajärvi through Kissakoski Canal.

The largest lake salmon in Finland in the 21st century, which weighed 12.4 kg, came from Puula.