Richard Cowan may refer to: Richard David Cowan (1909-1939), long-term companion of Stewart Mitchell Richard Sumner Cowan (1921–1997), American botanist Richard Cowan (soldier) (1922–1944), American soldier Richard O. Cowan (born 1935), historian of the Church of Jesus Christ of Latter-day Saints Richard Cowan (cannabis activist) (born 1940), American cannabis activist Rich Cowan (born 1956), American politician, film producer and director Richard Cowan (bass-baritone) (1957–2015), American opera singer