Akita City Ōmoriyama Zoo, Zoo in Ōmoriyama Park, Akita, Japan

Akita City Ōmoriyama Zoo is a municipal zoo in Hamada, Akita, on about 15 hectares inside Ōmoriyama Park. Its long, low entrance building has an orange-brown wood-effect upper facade, white lower walls, green cylindrical columns and glass doors with animal decorations. The zoo keeps roughly 93 species, including giraffes, African elephants, snow leopards and chimpanzees.

The zoo began in October 1950 as a facility attached to the Akita Prefectural Children's Hall in Senshū Park, on the site of the former Kubota Castle. It was transferred to Akita City in April 1953 and renamed the Akita City Children's Zoo. In 1973 it moved to its present 15-hectare site in Hamada, within Ōmoriyama Park.

The nickname "Milve" was chosen by public competition in 2006, and the mascot "Omorin" followed in 2013, created by students of Akita Public Arts and Crafts Junior College. Since 2016 the zoo has carried the naming-rights name "Omoriyama Zoo: Akigin Omorin no Mori", after Akita Bank acquired the rights in November 2015.

The zoo sits about 30 minutes by bus from Akita Station and is easy to reach. Visitors can purchase feed during their visit to directly feed certain animals and gain a closer experience with them.

The zoo's giraffe house recalls Taiyō, a giraffe fitted with a prosthetic leg who became the park's best-known animal until his death in 2002; his name survives on a front-gate object and on the roller coaster "Kirin Taiyō-kun" in the adjacent amusement park.