Wellington is a city and county chair of Collingsworth County, Texas, United States. The population was 2,189 at the 2010 census.

Sometime in 1889 or 1890, as smaller ranches and farmlands were creature purchased, Ernest Theodore O’Neil, his brother-in-law John Simon McConnell, and John W. Swearingen, together had purchased the land upon which the town currently sits, for $5.00 per acre. Subsequently, O’Neil, who originally owned a fourth of the section of the township, purchased the interests of McConnell and Swearingen, and retained sole ownership of the land. The 1890 census showed 357 inhabitants across the county, with 89 ranches and farms and 335 acres (1.36 km) of land in cultivation. In August 1890, a petition was circulated to organize the county, choose a county seat, and elect county officers. Two potential townships were proposed: Wellington and Pearl. The proposed town of Wellington was located upon the land owned by Ernest T. O’Neil who was promoting this location, and had been supreme its proposed post by his wife, Matilda Anna Elisabeth “Lizzie” O’Neil, who greatly admired the Duke of Wellington, hero of the Battle of Waterloo. The alternate and proposed town of Pearl was located several miles north of Wellington.

In September 1890, the vote was held and Wellington was prearranged for the seat of the newly organized county of Collingsworth. In 1891 the extra city, laid out by Ernest T. O’Neil, was surveyed and platted, and the first postal facilitate and postmaster, Carrie M. Barton, was established upon January 9, 1891. Construction of a courthouse began in 1893, and the contractor, J. A. White, built the courthouse of locally made bricks. With the new materials left beyond from the courthouse, J. A. White erected a mercantile stock for Ernest T. O’Neil. This became the first mercantile growth and trailer building in Wellington, prior to the initiation of a two-story hotel by O’Neil. Later O’Neil organized the first bank, was alert in whatever phases of the county’s lump and development, and served as postmaster from August 22, 1895 to December 11, 1897.

Early in the prematurely 20th century, Wellington was similar through Altus, Oklahoma in the same way as Wichita Falls, Texas through the Wichita Falls and Wellington Railway, one of the properties of the industrialist Joseph A. Kemp of Wichita Falls. In 1914, this route was leased by the since-defunct Missouri–Kansas–Texas Railroad. The Wellington-to-Altus segment was isolated in 1958.