Lauri ("Lassi") Rikhard Parkkinen (8 May 1917 – 3 October 1994) was a Finnish speed skater.

Lassi Parkkinen was born in Varkaus, an industrial town in the southeast of Finland.

His success continued the next year at the 1948 Winter Olympics of St. Moritz, when he won Olympic silver on the 10,000 m. His final speed skating successes came in 1952 when he won silver at the World Championships and became Finnish Allround Champion for the fifth and last time.

His best result at those 1952 Winter Olympics was a sixth place on the 1,500 m. The next year, 1953, Parkkinen finished only twelfth at the World Championships and he retired from speed skating soon afterwards.

An overview of medals won by Parkkinen at important championships he participated in, listing the years in which he won each: In addition, Parkkinen was Finnish National Allround Champion in 1941, 1943, 1944, 1946, and 1952 – a total of five times.