19th District Chester County Atglen Borough Avondale Borough City of Coatesville Charlestown Township Downingtown Borough East Bradford Township East Caln Township East Fallowfield Township East Nottingham Township East Whiteland Township Elk Township Franklin Township Highland Township London Britain Township London Grove Township Londonderry Township Lower Oxford Township Malvern Borough Modena Borough New Garden Township New London Township Oxford Borough Parkesburg Borough Penn Township Phoenixville Borough Sadsbury Township Schuylkill Township South Coatesville Borough Tredyffrin Township Upper Oxford Township Valley Township West Bradford Township West Chester Borough West Fallowfield Township West Grove Borough West Marlborough Township West Nottingham Township West Pikeland Township West Sadsbury Township West Whiteland Township