In Utah in 2012, the U.S. Census Bureau estimated through the American Community Survey (ACS) that there were 1,296,763 workers 16 years of age and over. Of these, 1.3 million workers, 18.6 percent, commuted outside their resident county to work. Five years ago, in 2007, this same percentage was estimated to be 17.9 percent.
The ACS produces annual results only for counties with a population of 65,000 or more. In Utah, only six counties are large enough. Their order from largest to smallest: Salt Lake, Utah, Davis, Weber, Cache and Washington counties. These six counties account for 84.7 percent of Utah’s population and 85.6 percent of Utah’s workers in 2012.
Below is a figure depicting the percent of workers in each county that commute outside their county for work.