PA State Senate District 38 is part of Allegheny County. The townships, boroughs, and neighborhoods of PA State Senate District 38 are:

Allison Park
Aspinwall
Bakerstown
Blawnox
Brackenridge
Bradford Woods
Cheswick
Curtisville
East Deer Township
Etna
Fawn Township
Fox Chapel
Franklin Park
Frazer Township
Gibsonia
Glenshaw
Hampton Township
Harmar Township
Harrison Township
Indiana Township
Marshall Township
McCandless Township
Millvale
Natrona
Natrona Heights
O’Hara Township
Pine Township
Pittsburgh Ward 11 – Highland Park
Pittsburgh Ward 12 – East Liberty
Pittsburgh Ward 12 – West Homewood
Pittsburgh Ward 12 – Larimer
Pittsburgh Ward 12 – Lincoln-Lemington-Belmar
Richland Township
Ross Township
Rural Ridge
Russellton
Shaler Township
Springdale
Springdale Township
Tarentum
Treesdale
Warrendale
West Deer Township
West View Borough
Wexford