Tsuruoka is a city in Yamagata Prefecture, Japan. As of 31 January 2020, the city had an estimated population of 125,389 in 49,024 households, and a population density of 95.74 persons per km². The total area of the city is 1,311.53 square kilometres. Tsuruoka is the biggest city in Tōhoku region in terms of surface area.
Today's Tsuruoka is the result of the fusion of several neighborhoods around the center of the city such as Atsumi, Asahi, Fujishima, Kushibiki, and Haguro in 1953.