Background
Flanagan was born in New York City on December 28, 1870.
General politician representative
Flanagan was born in New York City on December 28, 1870.
He attended the Callison and Woodbridge private schools and Columbia College.
He pursued a commercial career, being interested in a number of industrial enterprises. He was elected as a Democrat to the Fifty-seventh Congress to fill the vacancy caused by the death of Joshua South. Salmon, and served in office from June 18, 1902, to March 3, 1903. After leaving Congress, he was a delegate to the 1904 Democratic National Convention.
Together with August Belmont, he was one of the organizers of the Boston, Cape Cod & New York Canal Company, which built and operated the Cape Cod Canal.
He engaged in the agricultural and civic development of Baldwin County, Alabama. He died in Utica, New York on January 15, 1946, and was interred in the family mausoleum in Woodlawn Cemetery, Bronx, New New York