Cache County is a county located in the U.S. state of Utah, comprising the Cache Valley, up to the Idaho border, and the surrounding mountains. The Bear River Mountains, the northernmost extension of the Wasatch Range, which reach as high as 10,000 feet (3048 m), cover the eastern half of the county. The Bear River flows through Cache Valley. Wellsville was the first European settlement in the county, settled by Peter Maughan in 1853. According to the 2010 census the population was 112,656. It is included in the Logan, Utah-Idaho (partial) Metropolitan Statistical Area. It was named for the fur stashes made by many of the Rocky Mountain Fur Company trappers. Its county seat and largest city is Logan. - From Wikipedia, the free encyclopedia.