Callaghan is an unincorporated community and census-designated place (CDP) in Alleghany County, Virginia, United States. As of the 2020 census, Callaghan had a population of 203.
Humpback Covered Bridge and Wood Hall are listed on the U.S. National Register of Historic Places.
Callaghan was first listed as a census designated place in the 2010 U.S. census.