Association of Zoos and Aquariums (AZA) Reciprocal Admissions Program

How it works

Free or half-price admission at participating zoos and aquariums for members of another participating institution, depending on the reciprocity level of both.

• Find your home zoo or aquarium's reciprocity level and the level of the one you want to visit; the pair decides the benefit. 50% at either end means a 50% discount; 100% OR 50% at both ends means free admission; a free-to-the-public home zoo can expect free or half-price admission at a 100% OR 50% zoo. Free-to-the-public zoos are free for everyone.
• Show your membership card from your home zoo or aquarium.
• Reciprocity covers admission to the main facility during normal operating days and hours. Special exhibits or events with an additional fee may be excluded.
• The number of visitors admitted on a family membership may vary, and parking may not be included.
• Library-borrowed memberships may be excluded; the membership must be your own.
• Nearby institutions are not required to reciprocate with each other; the Milwaukee County Zoo, for example, does not reciprocate with Henry Vilas, Lincoln Park, NEW Zoo or Racine.
• There is no limit on the number of visits. Call each zoo or aquarium before you visit to confirm the current policy.

Source: AZA's own page, list from Aug 2026. Not affiliated with or endorsed by the Association of Zoos and Aquariums. Each institution sets its own policy; always call ahead.