Gem County, Idaho 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 county in 1862
Georgia State Route 300 in a different part of the state, was much shorter, traveling from Monticello to a point northeast of Monticello (and about north of Eatonton), and existed from the 1960s to the 1980s. SR 300 begins at the Florida state line, where it is concurrent with US 19. On the Florida side of the state line, US 19 is concurrent with Florida State Road 57 (SR 57, which is unsigned), and is known as the Florida–Georgia Parkway. At the state line, SR 3 and SR 300 begin. US 19/SR 3/SR 300 head northwest until they enter Thomasville. In the city, they