Elected as a Democrat to the Forty-fourth Congress, Bagley was a U.S. Representative for the fifteenth district of New York. He served from March 4, 1875 to March 3, 1877. He was not a candidate for renomination in 1876 and resumed his former mercantile pursuits.
Elected as a Democrat to the Forty-fourth Congress, Bagley was a U.S. Representative for the fifteenth district of New York. He served from March 4, 1875 to March 3, 1877. He did not seek re-election in 1876 and returned to his previous mercantile activities.