part of Mexican state of Tamaulipas before 1836. Republic of Texas included it in San Patricio County. County named for Mier expedition member Capt. Ewen Cameron. County created 2/12/1848 from San Patricio County including parts of future Hidalgo, Willacy, Kenedy and Brooks Counties. On February 12, 1848, the Texas legislature decreed the existence of Cameron County, and with the signing of the Treaty of Guadalupe-Hidalgo on July 4 the area officially became part of the United States. The new county encompassed 3,308 square miles, including parts of the future Hidalgo, Willacy, Kenedy, and Brooks counties. Election for organization officially 8/7/1848 but not complete until 9/11/1848. -Handbook of Texas Online:Cameron 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.