Justice Barnes may refer to:

• Alanson H. Barnes (1817–1890), associate justice of the South Dakota Supreme Court
• Charles P. Barnes (1869–1951), associate justice and chief justice of the Maine Supreme Judicial Court
• John Barnes (judge) (1859–1919), associate justice of the Wisconsin Supreme Court
• John B. Barnes (1846–1921), associate justice of the Nebraska Supreme Court
• Richmond P. Barnes (1859–1946), associate justice of the New Mexico Supreme Court
• Wilson K. Barnes (1907–1997), associate justice of the Maryland Court of Appeals