Summit County is a
county located in the
U.S. state of
Utah, occupying a rugged and mountainous area. As of the
2010 census, the population was 36,324. Its
county seat is
Coalville, and the largest city is
Park City. The county was created in 1854 and later organized in 1861. It is so named because it includes 39 of the highest mountain peaks in Utah.