| Smallimage: | Benjamin B. Gunn.jpg |
| Constituency Mp: | Huron South |
| Parliament: | Canadian |
| Predecessor: | George McEwen |
| Successor: | Murdo Young McLean |
| Term Start: | 1904 |
| Term End: | 1907 |
| Birth Date: | 15 February 1860 |
| Birth Place: | Wallacetown, Canada West |
| Party: | Conservative |
Benjamin B. Gunn (February 15, 1860 – December 9, 1907) was a Canadian politician.
Born in Wallacetown, Canada West, Gunn was educated in Wallacetown and was a merchant by profession. He was elected to the House of Commons of Canada for the electoral district of Huron South in the general elections of 1904. A Conservative, he died in office in 1907.