Lincoln Park Zoo, also known as Lincoln Park Zoological Gardens, is a 35-acre zoo in Lincoln Park, Chicago, Illinois. The zoo was founded in 1868, making it the fourth oldest zoo in North America. It is also one of a few free admission zoos in all of North America. The zoo is an accredited member of the Association of Zoos and Aquariums. The zoo also became an accredited arboretum in 2019.Lincoln Park Zoo is home to a wide variety of animals.