James McGrath was an Irish-born American politician who served as a member of the Wisconsin State Assembly from 1865 to 1874.
McGrath was born on March 15, 1836, in Ireland. He later resided in Milwaukee, Wisconsin.
McGrath was a member of the Assembly during the 1865, 1866, 1867, 1868, 1870, 1873 and 1874 sessions. A Democrat while he was a member, he lost to Edward Keogh as an Independent in 1875.