Seymour Lowman (October 7, 1868 – March 13, 1940) was an American lawyer and politician from the state of New York.

He studied law with attorney John W. Church of Norwich, was admitted to the bar in 1891, and practiced in Elmira.

Lowman became active in local politics as a supporter of the campaigns of Jacob Sloat Fassett.

At the same time, Democratic Governor Al Smith was re-elected, while his running mate George R. Lunn was defeated.

From August 1, 1927, until the end of the Hoover administration in 1933, Seymor Lowman was Assistant U.S. Secretary of the Treasury under Andrew W. Mellon and Ogden L. Mills, and as a well-known "dry" (against the sale and consumption of alcoholic beverages) was in charge of the enforcement of Prohibition.