Koljonen

Koljonen is the surname of the following people
 * Kalle Koljonen (born 1994), Finnish badminton player
 * Niilo Koljonen (1927–2004), Finnish social scientist
 * Pele Koljonen (born 1988), Finnish footballer
 * Toivo Koljonen (1912–1943), Finnish murderer
 * Vilho Koljonen (1910–2000), Finnish writer and photographer