| Harry Dwight Sisson | |
| Office: | Member of the Massachusetts House of Representatives 38th Berkshire District |
| Term Start: | 1929 |
| Term End: | 1938 |
| Office2: | 8th Mayor of Pittsfield, Massachusetts |
| Term Start2: | 1903 |
| Term End2: | 1904 |
| Predecessor2: | Allen H. Bagg |
| Term Start3: | 1896 |
| Term End3: | 1900 |
| Term Start4: | 1892 |
| Term End4: | 1894 |
| Birth Date: | 9 January 1863 |
| Resting Place: | Pittsfield Cemetery |
| Alma Mater: | New Marlborough Academy |
| Profession: | Editor of the Connecticut Western News of Canaan, Connecticut; Employed Kellogg Shoe Company (in 1882) Agent of the Berkshire Life Insurance Co. Proprietor of the Sisson/Robinson Company (manufacturing paper boxes). From 1904 founder and proprietor of the Sisson Buick Co. |
Harry Dwight Sisson (January 9, 1863 – November 4, 1938) was an American businessman and politician who served as the eighth mayor of Pittsfield, Massachusetts from 1903 to 1904.
Sisson's parents were Henry Dwight Sisson (1836–1914) and Emilie Persis Spaulding (1836–1923).
Sisson married Elizabeth C. Wells (July 3, 1860 – February 28, 1955) on February 17, 1886.
Sisson was a member of the Sons of Veterans. In 1919, he was elected to a one year term as national commander-in-chief of the organization.
Sisson is buried in the Pittsfield Cemetery in Pittsfield, Massachusetts.