As of September 2015, the admission cost for the Houston Zoo ranges from $16 per person to free, based on things such as age or membership to the zoo. Children who are two to 11 years old pay $12 per ticket, while younger children get in free.
Senior citizens pay $9.50 to get into the Houston Zoo, as long as they are over the age of 65. Adults between the ages of 12 and 65 pay $16 for admittance. Zoo members always receive unlimited admission while active members. The Houston Zoo also offer various discount deals from time to time to save money on admission.