Cache Valley (Shoshoni: Seuhubeogoi, “Willow Valley”) is a valley of northern Utah and southeast Idaho, United States, that includes the Logan metropolitan area. The valley was used by 19th century mountain men and was the site of the 1863 Bear River Massacre. The name, Cache Valley is often used synonymously to describe the Logan Metropolitan Area, one of the fastest growing metro areas in the US per capita — both in terms of economic GDP and population.

The Logan Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of two counties – one in Utah and one in Idaho, anchored by the city of Logan. As of the 2010 census, the MSA had a population of 125,442. As of the 2020 Census, the population had risen to 147,908, and further expanded to an estimated 155,362 as of 2022. The Logan metropolitan area is colloquially called Cache Valley, where most of the population resides.