Shelton is a city in Fairfield County, Connecticut, United States. The population was 40,869 at the 2020 United States Census.

Shelton was granted by the English as share of the town of Stratford, Connecticut, in 1639. On May 15, 1656, the Court of the Colony of Connecticut in Hartford affirmed that the town of Stratford included anything of the territory 12 miles (19 km) inland from Long Island Sound, between the Housatonic River and the Fairfield town line. In 1662, Stratford selectmen Lt. Joseph Judson, Captain Joseph Hawley and John Minor had secured anything the written actions of transfer from the Golden Hill Paugussett Indian Nation for this Big territory that comprises the present-day towns of Trumbull, Shelton and Monroe. Shelton was split off from Stratford in 1789, as Huntington (named for Samuel Huntington).
The current post originated in a manufacturing village started in the 1860s named for the Shelton Company founded by Edward N. Shelton—also founder of Ousatonic Water Power Company.
The shortly growing borough of Shelton incorporated as a city in 1915 and was consolidated subsequent to the town of Huntington in 1919 establishing the gift city of Shelton.

Shelton was the site of one of the largest arson fires in the United States history. It happened in 1975 taking into account the Sponge Rubber Products plant (formerly owned by B.F. Goodrich) was set upon fire. Charles Moeller, president of parent company Grand Sheet Metal Products, was acquitted of criminal charges, but in a suit under civil law (where preponderance of evidence suffices to assert a factual claim), a judges found in 1988 the insurer was entitled to disallow claims on the flame losses, based upon the finding that the company’s top officials contracted the blaze to claim insurance money. Eight others were convicted or pleaded guilty.

The explosion that destroyed the Sponge Rubber Plant upon Canal Street in 1975 marked the start of the decline of Shelton’s industries. During the remainder of the 1970s and 1980s several firms that operated factories along the banks of the Housatonic River either went out of issue or relocated to areas where labor and functional costs were cheaper. In 1995, Sikorsky Aircraft closed a tree-plant off Bridgeport Avenue that manufactured electrical components for helicopters.^{[citation needed]}