Tiilikainen is a Finnish surname. Notable people with the surname include:
Kim Tiilikainen (born 1975), Finnish tennis player and coach Kimmo Tiilikainen (born 1966), Finnish politician Paavo Tiilikainen (1923–2007), Finnish politician Teija Tiilikainen (born 1964), Finnish political scientist Tommi Tiilikainen (born 1987), Finnish volleyball coach and player