24/7 Trauma and Biohazard Cleanup in Flagtown, NJ

Flagtown is an unincorporated community and census-designated place located within Hillsborough Township in Somerset County, New Jersey.

As of the 2020 census, Flagtown had a population of 1,070.

The original settlement, spelled Flaggtown on an 1850 Somerset County map, was named for Jacob Flagg, who purchased a tract of land there in 1700.

A Flagg descendant's tavern in the settlement served as headquarters for the Hillsborough Company during the American Revolutionary War and as a local voting place at election time.

The area's first school was built about 1725, and its 1795 replacement was painted red and white and called the Old Red School House.

In 1873 the South Branch Railroad cut through the area, and the northern settlement became known as Flaggtown Station while the southern part kept the name Flaggtown.

Confusion between the two names led the U.S. Post Office to rename the original Flaggtown as Frankfort on January 28, 1878, while Flaggtown Station became today's Flagtown.

By 1891 two train stations stood in the area, one for each rail line, just west of South Branch Road, though no remains of either station exist today.

Flagtown has its own post office with ZIP code 08821, but because there is no house-to-house mail delivery, residents must use P.O. box addresses.

The Flagtown Fire Department, formally Hillsborough Volunteer Fire Company No. 1, was the first fire company formed in Hillsborough Township, receiving its charter on May 27, 1938.