Forgot about this thread! I now tie or lead in every state surrounding me.
Delaware: 3 (3 Palms, Barn Hill, Brandywine). Those are all of the zoos in DE. There's a few nature centers with odds and ends but nothing more than a couple of herps and fish, I once stopped at an antique store that had some farm animals, raccoons, and a fox, and there's a campsite with fallow deer.
Maryland: tie for 5 (Catoctin, Maryland Zoo, National Aquarium, Plumpton Park, Salisbury Zoo)
New Jersey: lead with 9 (Adventure Aquarium, Bergen County Zoo, Cape May County Zoo, Cohanzick Zoo, Jenkinson's Aquarium, Johnson Park, SeaQuest, Six Flags Great Adventure, Turtle Back Zoo). Not counting any from when I was a kid for that one.
Pennsylvania: lead with 11 (Claws N Paws, Electric City Aquarium, Elmwood Park Zoo, Keystone Safari, both Living Treasures locations, Philadelphia, Pittsburgh, Pocono Snake Farm, Upper Schuylkill Valley Park, ZooAmerica)
Virginia: tie with 10 (Leesburgh, Luray, Maymont, Metro Richmond, Natural Bridge, Roer's Zoofari, VA Aquarium, VA Living Museum, VA Safari, VA Zoo)
Does Washington DC count towards Maryland or Virginia? I have both for there as well, the zoo and the aquarium that closed years ago.