When faced with a petition to make Whatley a town, there was no mention of a name. Massachusetts Governor Hutchinson named the town in honor of Thomas Whately -- the son of the director of the Bank of England, who was an ardent horticulture expert and the first member of his family to become a member of Parliament. Ironically, the town's namesake never set foot in America, though, and died a year after Whately was incorporated, never having formally acknowledged the honor.

Williamsburg is home to the famous Searsville Bridge, which was built in 1761 as part of a military highway to facilitate the movement of troops and equipment to help the Colonists stave off attacks from the French and Indians.

During the next century, Williamsburg evolved into a thriving industrial town dependent upon the aptly named Mill River to power its sawmill, grist mill, and other manufacturing interests. Spanning Mill River, the Searsville Bridge and Searsville village within Williamsburg is named in deference to Nathaniel Sears, who operated a custom dressing, fulling, and dyeing mill from 1819 until 1862. The industrial character of the town forever changed after the Mill River Disaster, a flood on July 4, 1874 which destroyed not only Searsville but also several nearby villages.

Although the old Searsville Bridge -- once known as the Schoolhouse Bridge -- was condemned for safety reasons in the late 1980's, it reopened in 1999 and has now been commemorated by the Williamsburg Historical Commission.