Rep Williams. is a member of the PA House of Representatives. He represents the 74th District in Chester County, which includes  CITY of Coatesville and the TOWNSHIPS of Caln (PART, Districts 01, 02 and 03), Honey Brook, Sadsbury, Valley, West Caln and West Sadsbury and the BOROUGHS of Atglen, Honey Brook, Modena, Parkesburg and South Coatesville.