Guy Brasfield Park (June 10, 1872 – October 1, 1946) was an American politician from the U.S. state of Missouri.
Park was born in Platte City, Missouri to Thomas Woodson and Margaret Baxter Park. He studied at Gaylord Institute in Platte City and graduated from law school at the University of Missouri in 1896. Park practiced law in Platte City and served as Platte City's attorney and Platte County prosecuting attorney. He married Eleanora Gabbert in 1909. Together they had a daughter, Henrietta.
In 1922, Park was elected as a judge for Missouri's fifth judicial circuit court and the Missouri State Constitutional Convention. In 1928, he was re-elected as circuit court judge, but resigned in 1932 to pursue a gubernatorial nomination. Park was selected by the Missouri Democratic Party as a candidate for Governor of Missouri after candidate Francis Wilson died in October 1932. Park defeated opponent Edward Winter by over 300,000 votes.
Park was not eligible to seek re-election in 1936 and he returned to practicing law in Platte City. His political service included two further Missouri State Constitutional Conventions in 1943 and 1944. He died on October 1, 1946, in Jefferson City, Missouri.