Trumbull is a town located in Fairfield County, Connecticut, United States. It borders on the cities of Bridgeport and Shelton and the towns of Stratford, Fairfield, Easton and Monroe. The population was 36,827 during the 2020 census. Trumbull was the home of the Golden Hill Paugussett Indian Nation for thousands of years before the English settlement was made in 1639. The town was named after Jonathan Trumbull (1710–1785), a merchant, patriot and statesman when it was incorporated in 1797. Aviation pioneer Igor Sikorsky lived in Trumbull during his active years when he designed, built, and flew fixed-wing aircraft and put the helicopter into mass production for the first time.

The area comprising the town of Trumbull was occupied by the Paugusset Indian nation for thousands of years before English colonists arrived here during the Great Migration from England and established the town of Stratford, Connecticut, in 1639.

In 1725, Stratford residents living in the northern part of the town petitioned the Colony of Connecticut to establish their own separate village. They wished to call their new village Nickol’s Farms, after the family who lived in its center. However, the Colony named it Unity instead. The village of Unity merged with the village to its west called Long Hill (organized in 1740), to form the town of “North Stratford” in 1744.

In the late 1780s, North Stratford began to petition the Connecticut General Assembly seeking independence from Stratford. The Assembly finally granted full town rights in October 1797 and named the new town after Jonathan Trumbull (1710–1785), a merchant, patriot, statesman and slave owner when it was incorporated in 1797. Aviation pioneer Igor Sikorsky lived in Trumbull during his active years when he designed, built, and flew fixed-wing aircraft and put the helicopter into mass production for the first time.

The Pequonnock River is the only major waterway in Trumbull, beginning northwest of Old Mine Park at the Monroe border and flowing southeasterly through the Pequonnock River Valley State Park, Trumbull Center and Twin Brooks Park. The river leaves Trumbull and continues into Beardsley Park in Bridgeport.

Major bodies of water include Canoe Brook Lake, Pinewood Lake, Tashua Hills Golf Club Pond, and the six Twin Brooks Park ponds. Minor bodies of water include Curtiss (Secret) Pond, Dogwood Lake, Frog Pond, Kaatz Pond, Kaechele Pond, Porters Pond, Thrush Wood Lake and Unity Park Pond.