James Barnes (September 6, 1842 – November 8, 1924) was a farmer, lumberman, railway contractor and political figure in New Brunswick, Canada.
He represented Kent County in the Legislative Assembly of New Brunswick from 1895 to 1908 as a Liberal member.
Barnes married a Julia Eliza Smith there.
He ran unsuccessfully for a seat in the provincial assembly in 1892.
This article about a member of the Legislative Assembly of New Brunswick is a stub.