The Maryland Zoo -- also known as The Maryland Zoo in Baltimore and formerly known as The Baltimore City Zoo or the Baltimore Zoo -- is a 135-acre park located in historic Druid Hill Park in Baltimore, Maryland. The Maryland Zoo is currently home to over 2,000 animals. Wikipedia Accredited by Association of Zoos and Aquariums (AZA) Nonprofit 501(c)(3) organization / The Maryland Zoological Society / EIN: 52-0996352