| Benjamin Franklin Haines | |
| Office2: | 8th Mayor of Medford, Massachusetts |
| Term Start2: | 1915 |
| Term End2: | 1922 |
| Predecessor2: | Charles S. Taylor |
| Successor2: | Richard B. Coolidge |
| Majority2: | 130 |
| Office3: | Delegate to the 1917 Massachusetts Constitutional Convention Representing the 26th Middlesex District of the Massachusetts House of Representatives |
| Term Start3: | June 6, 1917 |
| Term End3: | April 6, 1918 |
| Office4: | Member of the Massachusetts House of Representatives 28th Middlesex District |
| Term Start4: | 1911 |
| Term End4: | 1914 |
| Office5: | Member of the Medford, Massachusetts Board of Aldermen |
| Term Start5: | 1908 |
| Term End5: | 1910 |
| Birth Date: | November 25, 1876 |
| Birth Place: | Boston, Massachusetts |
| Death Place: | Orange County, Florida |
| Spouse: | Carrie Gibbs Bly |
| Children: | Webber Bly Haines, b. April 3, 1906. Lewis DeMaugh Haines. |
| Residence: | 52 Central Avenue, Medford, Massachusetts (1915) |
| Alma Mater: | Brown University, Boston University School of Law, 1899 |
| Occupation: | Citrus grower (1935) |
| Profession: | Attorney, 1902 |
Benjamin Franklin Haines (1876–1942) was a Massachusetts attorney and politician and a Florida businessman. Haines served as a member of the Medford, Massachusetts, board of aldermen, the Massachusetts House of Representatives, as the eighth mayor of Medford, Massachusetts, and as the mayor of Altamonte Springs, Florida.
Haines was born November 25, 1876. He was the son of American businessman John DeMaugh Haines. and Kate Luslie (Phillips) was born in Boston, Massachusetts Haines on November 25, 1876.
On June 11, 1902 Haines married teacher Carrie Gibbs Bly, the daughter of William L. Bly and Ella F. (Gibbs) Bly in New Bedford, Massachusetts. They had two children, Webber Bly Haines, born April 3, 1906 and Lewis DeMaugh Haines.
Beginning in 1900, Haines practiced law in Boston.
In the municipal elections of December 8, 1914, Haines was elected the Mayor of Medford, defeating two term Mayor Charies S. Taylor by 130 votes.
In 1916 the Massachusetts legislature and electorate approved a calling of a Constitutional Convention. In May 1917, Haines was elected to serve as a member of the Massachusetts Constitutional Convention of 1917, representing the 26th Middlesex District of the Massachusetts House of Representatives.
In the municipal elections of 1931 Haines was elected the Mayor of Altamonte Springs, Florida.