Pietilä is a Finnish surname. Notable people with the surname include:
Pekka Ala-Pietilä (born 1957), Finnish businessman Bonita Pietila (born 1953), American casting director and producer for The Simpsons Maria Pietilä Holmner (born 1986), Swedish alpine skier Reima Pietilä (1923–1993), Finnish architect and professor Raili Pietilä (1926–2021), Finnish architect Tuulikki Pietilä (1917–2009), Finnish graphic artist and professor