Williamsburg is a statutory town located in Fremont County, Colorado, United States.

[5] The Florence post office (ZIP code 81226) serves Williamsburg.

[7] It is bordered to the east by the city of Florence and to the south by the town of Rockvale.

Cañon City, the county seat, is 8 miles (13 km) to the northwest.

According to the United States Census Bureau, Williamsburg has a total area of 3.6 square miles (9.2 km2), all of it land.