Troy is a city in Latah County, Idaho, United States. Located in the eastern part of the Palouse region, its population was 862 at the 2010 census.

Latah County is a county located in the north central region of the U.S. state of Idaho. As of the 2020 census, the population was 39,517. The county seat and largest city is Moscow, the home of the University of Idaho, the state's flagship university.