Jensen is a census-designated place in eastern Uintah County, Utah, United States. The population was 412 at the 2010 census. It lies along the Green River and U.S. Route 40, southeast of the city of Vernal, the county seat of Uintah County, and about 17 miles west of the Colorado border. Although Jensen is unincorporated, it has a post office, with the ZIP code of 84035.Jensen was first settled in 1877 and named for Lars Jensen, an early prospector and ferryman. Today its main importance is as the Utah entrance to Dinosaur National Monument.