Ōmi Province was a province of Japan, which today comprises Shiga Prefecture. It was one of the provinces that made up the Tōsandō circuit. Its nickname is Gōshū (江州). Under the Engishiki classification system, Ōmi was ranked as one of the 13 "great countries" (大国) in terms of importance, and one of the "near countries" (近国) in terms of distance from the capital.

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.