Sponsored Topics. Hansen is a city in Twin Falls County, Idaho, United States. The population was 970 at the 2000 census. It is part of the Twin Falls, Idaho Micropolitan Statistical Area. Hansen is located at 42°31′52″N 114°18′6″W / 42.53111°N 114.30167°W / 42.53111; -114.30167 (42.531246, -114.301550).