Fort Frederick (Chittenden County, Vermont)

Chittenden County · Vermont · Pre-Revolutionary War / Revolutionary War era

Quick BriefIra Allen constructed Fort Frederick in 1773 along the Winooski River in Chittenden County as a blockhouse to protect his Onion River Land Company operations and settlers against attacks from New York authorities and Native Americans. The structure served dual purposes as both a defensive fortification and a commercial facility during the pre-Revolutionary conflict over Vermont's governance.

History & Significance

Fort Frederick was a blockhouse built by Ira Allen, a leading Vermont founder and land speculator, in 1773 at the Winooski (then called Onion) River. Allen named it after the ten-year-old Frederick, Duke of York and Albany, second son of King George III.

The fort served as a stronghold for Allen's Onion River Land Company, which was engaged in purchasing frontier lands while Vermont remained disputed territory between the Province of New Hampshire and the Province of New York. The blockhouse protected settlers and company operations against both New York authorities attempting to enforce their colonial claims and potential attacks from local Native Americans.

Allen, a surveyor and younger brother of the famous Ethan Allen, was instrumental in the New Hampshire Grants dispute and became a key figure in Vermont's early Revolutionary history. Though modest compared to larger stone fortifications of the era, Fort Frederick represented the frontier expansion and land-speculating enterprises that drove settlement in the contested region during the 1770s.