incorporated on March 2, 1778; its designated name at incorporation was to be Exeter. However, the town's citizens opted to call it Franklin, in honor of the statesman Benjamin Franklin, the first municipality in the United States to be so named.

It was hoped that Benjamin Franklin would donate a bell for a church steeple in the town, but he donated 116 books instead, including Night-Thoughts, James Janeway's Invisible Realities, and the works of John Locke.