Nagahama is a city located in Shiga Prefecture, Japan. As of 1 November 2021, the city had an estimated population of 116,043 in 46858 households and a population density of 120 persons per km2. The total area of the city is 680.79 square kilometres (262.85 sq mi).

Shiga Prefecture is a landlocked prefecture of Japan located in the Kansai region of Honshu. Shiga Prefecture has a population of 1,412,916 and has a geographic area of 4,017 km2 (1,551 sq mi). Shiga Prefecture borders Fukui Prefecture to the north, Gifu Prefecture to the northeast, Mie Prefecture to the southeast, and Kyoto Prefecture to the west.