Pittsburgh Zoo and Aquarium
- Pittsburgh. 4000 animals representing 475 species on 77 acres. Includes children's zoo. General information, zoo map, animal photos and descriptions, special events, education program summary and conservation information.
- http://www.pittsburghzoo.com/

Elmwood Park Zoo
- Norristown near Philadelphia. 150 animals on 16 acres including children's petting barn. General information, education program summary, and zoo overview.
- http://www.elmwoodparkzoo.org/

Philadelphia Zoo
- 1800 animals. America's first zoo. General information, program and event summary, a complete list of animals with photos, descriptions, videos and webcams, and information on sponsorship.
- http://www.philadelphiazoo.org/

ZOOAMERICA North American Wildlife Park
- Hershey near Harrisburg. Admission and hours, education program summary, park map, conservation information and exhibit overview.
- http://www.hersheypa.com/attractions/zooAmerica/

Living Treasures Animal Park
- Features exotic animals and a petting zoo at locations in Moraine and Laurel Highlands. Includes visitor information and local attractions.
- http://www.ltanimalpark.com/

Penn's Cave
- Centre Hall. All water cavern and wildlife park. Includes information on tours, rates, schedule, events, gift shop and location.
- http://www.pennscave.com/

Clyde Peeling's Reptiland
- Allenwood. Includes information about visiting, travelling exhibits, lectures, and parties.
- http://www.reptiland.com/

Animaland Zoological Park
- Wellsboro in Tioga County. Home to over 200 exotic, wild and domestic animals, with a petting zoo. Location, hours, admissions, services, and local links.
- http://www.animalandzoo.com/

The Erie Zoological Park and Botanical Garden
- 500 animals representing 100 species on 15 acres. General information, animal photos, descriptions and webcam, education program summary, puzzle, news and special events.
- http://www.eriezoo.org/

Game Preserve - Lehigh Valley Zoo
- Schnecksville near Allentown. 1200 acres includes children's zoo. General information, park map, animal photos and sounds, special program summary and digital postcards.
- http://www.gamepreserve.org/

National Aviary in Pittsburgh
- Pittsburgh. 500 birds representing 200 species. General information, special events, bird photos, descriptions and information, and bird sexing lab services.
- http://www.aviary.org/

Claws 'n' Paws Wild Animal Park
- Hamlin near Scranton. 300 animal representing 120 species on 30 acres. Admission, directions, exhibit descriptions and animal list.
- http://www.clawsnpaws.com/