Callaghan (Callahan) was established in 1881 as a cattle shipping point on the International and Great Northern Railroad in Webb County. The settlement was named for Charles Callaghan of the Callaghan Ranch. A post office operated there under the name Callahan in 1880–81. The Callaghan Ranch was still operating in the 1980s, but by that time the community was gone.
Adapted from the official Handbook of Texas, a state encyclopedia developed by the Texas State Historical Association (TSHA). It is an authoritative source of trusted historical records.
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