Salt Lake County is located in the U.S. state of Utah. As of the 2010 United States Census, the population was 1,029,655, (1,160,437 as of July 1, 2019) making it the most populous county in Utah. Its county seat and largest city is Salt Lake City, the state capital. The county was created in 1850. Salt Lake County is the 37th most populated county in the United States and is one of four counties in the Rocky Mountains to make it into the top 100. (Others being Denver County and El Paso County, Colorado and Clark County, Nevada.) Salt Lake County is the only county of the first class in Utah - which under the Utah Code (Title 17, Chapter 50, Part 5) is a county with a population of 700,000 or greater.