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 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 married Elizabeth C. Wells (1860–1955) on February 17, 1886.

This article about a Massachusetts politician is a stub.