United States representative politician
He attended Boise High School and then transferred back east to Phillips Exeter Academy in New Hampshire. Coffin then entered Yale University"s Sheffield Scientific School, where he was a member of Saint Anthony Hall, and was graduated from the law department of Yale University in 1910.
Born in Caldwell, Idaho Territory, Coffin moved with his family to nearby Boise in 1898. He was admitted to the bar in 1911 and was a deputy county attorney for Ada County in Boise and in 1913 became an assistant attorney general of Idaho. Coffin relocated east across the state to Pocatello in December 1915 and went into private practice.
He served in the United States. Navy in World War I as a Petty officer, second class in the aviation division.
Coffin was elected mayor of Pocatello in 1931 and ran for Congress in the 2nd district in 1932. In the Democratic landslide, he easily defeated the ten-term Republican incumbent, Addison T. Smith.
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Only fifteen months into his first term, Coffin was struck by an automobile on a driveway in the south grounds of the United States. Capitol on June 4, 1934, and suffered a fractured skull. He died four days later at Providence Hospital in Washington, District of Columbia, and was buried on June 14 in Pocatello.
