Kenneth Lloyd Swenson (born April 18, 1948 in Clay Center, Kansas) is a retired middle-distance runner from the United States.

[3][4] Swenson set his personal best for 800 meters, 1:44.8, on July 16, 1970 in Stuttgart in a dual meet between the United States and West Germany; the time was the fastest in the world that year and a new American record for the metric distance.

[5][6][note 1] Track & Field News ranked Swenson the world's second-best half-miler that year, behind Yevgeniy Arzhanov of the Soviet Union.

[8] In 1971 Swenson only placed third in the AAU outdoor meet (behind Juris Luzins and Jamaica's Byron Dyce); however, he won gold at the Pan American Games in Cali, running 1:48.08.

[1] Swenson continued his career for several more years; in March 1975 he joined the International Track Association (ITA), a professional circuit.