In 1840 the Congress of Texas formed Lamar County, which included present-day Delta County, from Red River County. In March 1846 the new state legislature organized Hopkins County, which absorbed the southern two-thirds of Delta County. In 1868 they petitioned the legislature to form a new county that would include parts of Hopkins, Lamar, Hunt, and Fannin counties. After much debate, Texas lawmakers granted their request on July 29, 1870, but only after excluding Hunt and Fannin counties because neither wished to be included. Governor Edmund J. Davisqv designated a five-man board of commissioners to organize the new district, to be called Delta County for its triangular shape. The county seat would be a new town named Cooper after Leroy Cooper, chairman of the House Committee on Counties and Boundaries, and situated directly between the North and South Sulphur rivers. -Handbook of Texas Online: Delta County

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This list contains or will contain all post offices known from Texas. Noted also are whether recent offices have had at least one precancel type, as listed in the Precancel Stamp Society's Town and Type Catalog of the United States and Territories, Sixth edition, Summer 1998, and from Fosters' personal knowledge. A link is provided to detailed precancel data for that location. The precancel device(s) may or may not still exist. An * indicates a discontinued post office or name change. Pester the active post offices so that devices can be retained or ordered. They may be found many times, but only have to be thrown away once. Precancel devices are not usually issued to branches, stations or contract post offices. Please see plans page for color legend.