Laitinen is a Finnish surname. Notable people with the surname include:
Arto Laitinen, Finnish philosopher Artturi Laitinen (1882–1959), Finnish schoolteacher and politician Diana Laitinen Carlsson, Swedish politician Haris Laitinen (born 1984), Swedish football player Ilkka Laitinen (1962–2019), Finnish military officer Jaana Laitinen-Pesola (born 1958), Finnish politician Jarno Laitinen (born 1988), Finnish ice hockey goaltender Juho Laitinen (1871–1946), Finnish farmer, cooperative organizer and politician Kalevi Laitinen, multiple people Kari Laitinen (born 1964), Finnish ice hockey player Leena Laitinen (born 1957), Finnish chess master Martti Laitinen (1929–2017), Finnish footballer Mika Laitinen (born 1973), Finnish ski jumper Nelli Laitinen (born 2002), Finnish ice hockey player Samu Laitinen (born 1999), Finnish footballer Taisto Laitinen (1933–2022), Finnish athlete Timo Laitinen (born 1972), Finnish sport shooter