Viitasaari is a Finnish town and municipality located in the Central Finland region. The town has a population of 5,877 (31 December 2023) and covers an area of 1,589.13 square kilometres (613.57 sq mi) of which 340.43 km2 (131.44 sq mi), or 21%, is water. There are all together 230 lakes in Viitasaari. The biggest lakes are Lake Keitele, Lake Kolima and Muuruejärvi. The population density is 4.71 inhabitants per square kilometre (12.2/sq mi).