James Manahan (March 12, 1866 – January 8, 1932) was a U.S. Representative from Minnesota.

Manahan was born near Chatfield in Fillmore County, Minnesota to Irish immigrant parents.

He declined to be a candidate for renomination in 1914, and resumed his law practice.

He became involved with the Nonpartisan League and served as a legal advisor.

This article incorporates public domain material from the Biographical Directory of the United States Congress