Alonzo Monroe Clark (August 13, 1868 – October 12, 1952) was an American politician who was the 16th Governor of Wyoming from 1931 to 1933.

When the then-current governor, Frank Emerson died, on February 18, 1931, just six weeks into his second term, Clark succeeded to the governorship.

[2] In 1934 he successfully secured the Republican nomination, but lost in the general election to the then-incumbent, Democrat Leslie A. Miller.

The National Governors Association noted:[3] Serving during the Great Depression, Clark supported President Hoover’s position of state self-reliance.

He also pressed for cooperative marketing of agricultural products and the repeal of prohibition, and fought unsuccessfully for termination of the sale of crude oil from federal lands in Wyoming.He was married twice, first to Lucy M. Smith (who died in 1944) with whom he had one child, and then to Florence Russell.