Two excellent sources for finding lists of local Pennsylvania artists are Handmade in PA and Art-Collecting.com. Handmade in PA maintains a list of local artists involved in arts and crafts ranging from painting and sculpting to pottery and glass making. Art-Collecting.com's list is more focused on the fine arts.
Art-Collecting keeps a smaller list of artists whose works can be seen in local galleries. By contrast, Handmade in PA tracks a broader spectrum of artists and craftsman including those involved in jewelry, home decor, crochet, paper crafts and woodworking. It also keeps a database of physical store locations that artists maintain so people can visit artists directly and view their collections.