Bruce L. Castor, Jr. (born October 24, 1961) is an American lawyer and Republican politician from Montgomery County, Pennsylvania. Castor was District Attorney of Montgomery County from 2000 to 2008, when he took a seat on the Montgomery County Board of Commissioners, the elected position he currently holds. In addition to his governmental role, Castor is a partner in the Ardmore, PA based law firm of Rogers Castor.