Aylett Rains Cotton (November 29, 1826 – October 30, 1912) was an American politician, lawyer, judge, educator and miner active in Iowa and Northern California.
In 1870 he was elected a Republican to represent Iowa's 2nd congressional district in the United States House of Representatives. While serving in the Forty-second Congress, he narrowly defeated Democrat William E. Leffingwell to win a second term, becoming a member of the Forty-third Congress.[2] Although his official Congressional biography states that he declined to run for a third term in 1874, newspaper reports indicate that he was an active but unsuccessful candidate for renomination at the Republican district convention in DeWitt, Iowa, on September 1, 1874, losing to John Q. Tufts on the 30th ballot.[3] In all, he served from March 4, 1871, to March 3, 1875. He returned to California in 1883 and commenced practicing law in San Francisco, California, until his death.