Stig Lennart Blomqvist (born 29 July 1946 in Örebro) is a Swedish rally driver. He made his international breakthrough in 1971. Driving an Audi Quattro for the Audi factory team, Blomqvist won the World Rally Championship drivers' title in 1984 and finished runner-up in 1985. He won his home event, the Swedish Rally, seven times.
Outside the WRC, he won the British Rally Championship in 1983 and the Swedish Rally Championship several times. At the Race of Champions, Blomqvist took the title "Champion of Champions" in 1989 and 1990.