Shimizu-ku is the easternmost of the three wards of the city of Shizuoka in Shizuoka Prefecture, Japan.

Shizuoka is the capital city of Shizuoka Prefecture, Japan, and the prefecture's second-largest city in both population and area. It has been populated since prehistoric times. As of 1 September 2023, the city had an estimated population of 677,867 in 106,087 households, and a population density of 480 inhabitants per square kilometre (1,200/sq mi).