Admission is free at this large zoo, which opened over a century ago and features over 18,000 animals.
Spring Hours 2026
Last entry is 15 minutes before listed closing time.
February 28 through May 21, 2026
9 a.m.–5 p.m. daily (Zoo closes at 3 p.m. on Wednesday, May 20)
See special evening hours for ticketed Animals Aglow (March 13-May 17)
1 Government Drive 63110 St. Louis United States