Callaghan is a ranching community in Webb County, Texas, United States which was established in 1881. The community was named after a nearby ranch owned by Charles Callaghan, and much later, Joe B. Finley. The community was once a cattle shipping point on the International and Great Northern Railroad. Callaghan is served by the Callaghan Ranch Airport (ICAO: 90TX). Callaghan is fourteen miles north of Laredo.

Callaghan is located at 27°52′28″N 99°23′54″W / 27.87444°N 99.39833°W / 27.87444; -99.39833 (27.879444, -99.396667).

Callaghan is served by the United Independent School District in Laredo.