Nagano City Hall, Municipal administration center in Nagano, Japan

Nagano City Hall is a multi-story administrative building in the northern part of the city. It houses public service windows, various government departments, and spaces dedicated to municipal operations.

Nagano City Hall dates to 1897, when the new city took over the former Nagano town hall in Higashinomoncho. A two-storey Western-style wooden hall opened in Wakamatsu-cho in 1898. The main building moved to Midorimachi in 1965, designed by Saburo Jodaida with two basement floors and eight above. The current first building and the Nagano City Arts Center opened in December 2015.

The first building shares its structure with the Nagano City Arts Center, completed on 4 December 2015 on the site of the former Nagano Civic Hall; the arts center opened to the public on 8 May 2016. Corridors on floors 1 to 3 connect the two, so a visit to the hall can continue into the concert and exhibition spaces next door.

The first building faces Showa-dori, with the second building to its south along the Shinano Railway Kita-Shinano and Hokuriku Shinkansen lines; a second-floor walkway links them over the street. The first building connects to the Nagano City Arts Center on floors 1 to 3. It is about 11 minutes on foot from Nagano Station, or a short walk from the city hall bus stop and the Nagano Electric Railway's Shiyakusho-mae station.

The first and second buildings are linked by a second-floor walkway over a city road, and the first building shares a structure with Nagano City Arts Center, connected on floors 1 to 3. The current first building, designed by Saburo Jūdaita's firm's successor work aside, was completed on 4 December 2015 on the site of the former Nagano Civic Hall, with operations starting on 4 January 2016.