Mito City Library, Public library in Mito, Japan

Mito City Library is the central branch of a six-library municipal system, housed in a building completed on 31 May 1980 in Ōmachi 3-chōme. The building was designed by Mikami Architectural Design Office, chosen in a competition on 14 October 1978, and opened with a ceremony on 1 July 1980 attended by about 300 people. It was built alongside the Mito City Museum of History as part of the city's 90th-anniversary projects.

The library was established on 1 October 1944, after the Mito Domain Industrial History Research Society donated its collected materials and the Ibaraki Agricultural and Industrial Bank contributed 100,000 yen toward construction. It opened in a former 1922 building, but most of its holdings burned in the Mito air raid of 2 August 1945. After reopening in a borrowed school hall in 1946, it moved several times before the current building opened in 1980.

The library grew out of the Mito Domain Industrial History Research Society, founded in 1938, which collected documents on the domain's industry and economy. When its parent bank merged in 1944, the society donated its materials and pushed for a city library, and the bank contributed 100,000 yen toward construction. Part of the society's intended donation went instead to Tokiwa Shrine and the Shōkōkan.

The library features a digital catalog system that helps visitors find books easily, and private study rooms are available for focused work. Regular programs and events throughout the year add to what is offered here.

The facility has housed the Mito International Library section since 2016, a dedicated area with books in English, Chinese, and French. This section allows foreign visitors and residents to find materials in their own language.