Long Hill is a neighborhood[3] and census-designated place (CDP) in the town of Trumbull in Fairfield County, Connecticut, United States.

By the mid-1650s, the Golden Hill Paugussett Indian Nation began to petition the Court of the Colony of Connecticut for compensation for lost territory taken by the encroaching English settlement at Stratford.

[4] The English continued to purchase territory from the Native Americans, entering the deeds of transfer into the land records.

In April 1662, Lt. Joseph Judson, Joseph Hawley, and John Minor secured the last written deed of transfer from the Paugussett Indian Nation for the entire western part of Trumbull, referred to simply as the "Long Hill purchase" lying west of land already purchased.

The green was enlarged to its present size in 1801, when the Bridgeport and Newtown Turnpike Company shifted the road west, to straighten out the route.

The spirit of public education was fostered early in Long Hill when the Stratford selectmen voted on January 11, 1716, to allow the farmers settled there use of the "forty shillings per thousand allowed by law for seven years ensuing, provided they educate their children according to law.

The physical description of the new districts listed landmark houses, roads and geographical locations in the boundary descriptions that included Canoe Brook, Daniel Salmon's, Mr. Seeley Burrough's, Mr. Benjamin Beardslee's, the Weston and Stratfield Parish town lines as well as Mr. Enoch Gregory's, Mr. John Jones, Mr. John Fitch and the Newtown Road, present-day Main Street Connecticut Route 111.