

In addition, the northwestern section of the county includes part of the Great Salt Lake. Salt Lake County occupies the Salt Lake Valley, as well as parts of the surrounding mountains, the Oquirrh Mountains to the west and the Wasatch Range to the east (essentially the entire Jordan River watershed north of the Traverse Mountains). (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 – under the Utah Code (Title 17, Chapter 50, Part 5) is a county with a population of 700,000 or greater. 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. Its county seat and largest city is Salt Lake City, the state capital.

As of the 2020 United States census, the population was 1,185,238, making it the most populous county in Utah.
