Sinclair is a town in Carbon County, Wyoming, United States.

The original refinery, located just east of town, remains in use to this day.

[7][8] Just six miles east of Sinclair is the ghost town site of Benton, Wyoming at milepost 672.1 of the Union Pacific Railroad.

[9] As the terminal of the railroad at the time, Benton had a colorful three-month history which ended in September 1868 with a visit from Republican presidential candidate Ulysses S. Grant and the departure of the final overland wagon trains on the Mormon Trail headed for the Salt Lake Valley before completion of the railroad the following year.

[10] The original Ft. Steele was named for American Civil War Union General Frederick Steele and established June 20, 1868, to protect the Union Pacific Railway as it rapidly expanded west.

The small community continued until 1939 when the Lincoln Highway was paved and rerouted to coincide with what later became Interstate 80.

In 1940, following the short-lived Supreme Court decision Minersville School District v. Gobitis, residents tarred and feathered the town's Jehovah's Witnesses.

[11] According to the United States Census Bureau, the town has a total area of 2.43 square miles (6.29 km2), all land.

Public education in the town of Sinclair is provided by Carbon County School District #1.