Koistinen

Koistinen is a Finnish surname. Notable people with the surname include:

 Hannu Koistinen (born 1966), Finnish kantele maker
 Katri Helena Kalaoja (née Koistinen, born 1945), Finnish singer known by her stage name Katri Helena
 Matti Koistinen (born 1986), Finnish ice hockey player
 Otto Koistinen (born 1925), Finnish kantele maker
 Petteri "Kode" Koistinen, Finnish guitarist, member of the Finnish rock band Neljä Ruusua
 Ritva Koistinen (born 1956), Finnish kantele player
 Ville Koistinen (born 1982), Finnish ice hockey player

Category:Finnish-language surnames