Filer 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. It hosts the Twin Falls County Fair and Rodeo every September. Filer apartments for rent comparison page shows most up to date rent information on Filer apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.