| Jay Preston Barnes | |
| Office: | Mayor of Pittsfield, Massachusetts |
| Term Start: | 1928 |
| Term End: | 1932 |
| Predecessor: | Allen H. Bagg |
| Office2: | President of the Pittsfield, Massachusetts Board of Aldermen |
| Office3: | Member of the Pittsfield, Massachusetts Board of Aldermen Ward 5 |
| Death Date: | May 8, 1943 |
| Alma Mater: | Cornell, class of 1893. |
| Profession: | Civil Engineer |
| Spouse: | Mary Henrietta Dutton; M. 1894 |
| Children: | Harold Dutton Barnes, b. September 28, 1895. |
Jay Preston Barnes (August 9, 1869 – May 8, 1943) was an American politician who served as Mayor of Pittsfield, Massachusetts.
On October 25, 1894 Barnes married Mary Henrietta Dutton, the daughter of John and Henrietta M. (Tuthill) Dutton, they had a son, Harold Dutton Barnes, born on September 28, 1895.