Filer (FĪ-ler) is a city in Twin Falls County, Idaho, United States. As of the 2000 census the city population was 1,620. Filer is located just west of the intersection of U.S. Routes 93 and 30.
Filer is located at 42°34′11″N 114°36′41″W / 42.56972°N 114.61139°W / 42.56972; -114.61139 (42.569814, -114.611313).
According to the United States Census Bureau, the city has a total area of 0.8 square miles (2.1 km²), all of it land.