Sidney is an unincorporated community in Comanche County, Texas, United States.

Sidney was originally known as Jimmie's Creek, Canady or Round Mountain[2] before being named after a son of the community's first postmaster, John C. Stapp, in 1886.

Later this stream was named Jimmie's Creek for Captain James Cunningham.

[4] Tom Davis opened the first general store in 1883, and the first cotton gin was erected in 1895 by W. C. Jackson.

When the community reached peak population in the late 1890s and 1900s, Sidney had a barber shop, two-story lodge building, drug stores, gins, and general mercantile stores that sold everything from groceries to buggies.