David Callaghan (disambiguation)

David or Dave Callahan, Callaghan, or O'Callaghan may refer to:
 * David Callahan, founding editor of Inside Philanthropy, a digital media site
 * David Callahan (Home and Away), fictional character in the Australian soap opera
 * Dave Callaghan (born 1965), South African cricketer
 * Dave O'Callaghan (born 1990), Irish rugby union player
 * David O'Callaghan (dual player) (born 1983), Irish hurler and former Gaelic footballer for Dublin
 * David O'Callaghan (Kerry Gaelic footballer) (born 1987)