The Maryland Zoo in Baltimore
- 2000 animals including a children's zoo. General information, special events, exhibit overview, zoo map, education program summary, conservation information and online quizzes.
- http://www.marylandzoo.org/

Plumpton Park Zoo
- Rising Sun in Cecil County. Includes visitor information, zoo map, and list of animals with photos.
- http://www.plumptonparkzoo.org/

Catoctin Wildlife Preserve and Zoo
- Thurmont. Over 350 exotic animals on 26 beautiful acres. Membership, party, group visit, adopt-an-animal, volunteering and event information.
- http://www.cwpzoo.com/

National Aquarium in Baltimore
- Visitor information, aquarium map, exhibit descriptions, education program summary, animal photos and descriptions, research and conservation project information, and online interactive aquagames.
- http://www.aqua.org/

Salisbury Zoo
- Admission, hours of operation, directions, zoo map and animal photos.
- http://www.salisburyzoo.org/