- His family has announced that he has been diagnosed with dementia and is believed to be Alzheimer's disease. He is retiring from public life. (April 2021)
- Longtime friend of Betty White.
- Daughter Julie is a second generation employee at the Columbus Zoo & Aquarium, working in the Promotions Department as an animal educator.
- Jack first started appearing on national television programs in 1983, after the birth of twin gorillas at the Columbus Zoo, when he was invited to appear on Good Morning America (1975). Jack was already appearing on local television stations in Columbus, including a local television series called "Hanna's Ark," on the CBS Columbus affiliate, WBNS.
- Has traveled to all seven continents, North America, South America, Europe, Asia, Africa, Oceania (Australia, New Zealand, etc.), and Antarctica.
- Release of his book, "Monkeys on the Interstate: And Other Tales From America's Favorite Zookeeper" by Jack with John Stravinsky. (1989)
- As of 2013, over approximately the last 32 years since 1981, all of Jack's television series have been sponsored by Nationwide Insurance, which is also located/headquartered in Columbus, Ohio.
- Release of his book, "Jungle Jack: My Wild Life". (2008)
- Release of his book, "Jack Hanna's Ultimate Guide to Pets" by Jack with Hester Mundis. (1996)
- Has been granted honorary doctoral degrees from Muskingum University in New Concord, Ohio; Otterbein University in Westerville, Ohio; Capital University in Bexley, Ohio; and The Ohio State University in Columbus, Ohio.
- Director Emeritus of the Columbus Zoo & Aquarium and The Wilds since 1993, where there is still an attraction called "Jack Hanna's Base Camp," which is also used as a studio for his television shows, such as his current series, Jack Hanna's Wild Countdown (2011).
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