After the war, Griffin returned to practice law in Detroit in his partnership with William A. Moore. On September 1, 1875, he formed a new partnership with
Donald M. Dickinson under the name "Griffin and Dickinson". In 1883, he formed a new partnership, "Griffin & Warner", with Carlos E. Warner, who had become a partner with Moore after Griffin left. In 1888, the firm became "Griffin, Warner, Hunt & Berry". In 1890, when Berry retired and Hunt was elected assistant prosecuting attorney for Detroit, the firm's name returned to "Griffin & Warner". The firm was dissolved January 1, 1896. Griffin was the Fletcher professor of law in the
University of Michigan Law School 1886–1897. He was an unsuccessful candidate for the
Michigan Supreme Court in 1887. In November 1893, Griffin was elected a
Democrat from
Michigan's 1st congressional district to the
53rd Congress to fill the vacancy caused by the death of
John Logan Chipman, serving from December 4, 1893, to March 3, 1895. He was an unsuccessful candidate for re-election in 1894, losing to
Republican John Blaisdell Corliss. Levi Griffin resumed the practice of his profession and became pension agent in 1896 and 1897. He died in Detroit and was interred in
Woodmere Cemetery. ==Religion==