Gem County, Idaho County, Idaho were: Gem County, Idaho Gem County is a county in the U.S. state of Idaho. As of the 2010 census, the population was 16,719. The county seat and largest city is Emmett. Gem County is part of the Boise, ID Metropolitan Statistical Area. Gem County is home to the Idaho ground squirrel. Named for the state nickname, "Gem State," the county was established on March 15, 1915, partitioned from Canyon County and Boise County. Fur trappers were in the area as early as 1818, and Alexander Ross explored Squaw Creek in 1824. Prospectors and miners moved through the
State highways deleted by the Utah State Legislature in 1969 2.3 miles. The number was reused in 1975, when it was used to renumber the spur of SR-85 in Brigham City, itself a bypassed routing of US-91. State Route 91 was established May 14, 1935, and ran from Fairview at SR-32 (now US-89) northerly to Milburn. It was deleted in 1969 and the route number was reused in 1977 as the legislative designation for US-91. The road is now known as the Fairview Milburn Highway. State Route 92 was established May 14, 1935, and ran from SR-155 to Elmo. The number was not reused until the 1977 renumbering, for former