Ideal is an unincorporated community in northern Tripp County, South Dakota, United States, named for its superb farmland. It lies north of the city of Winner the county seat of Tripp County. Its elevation is 1,886 feet (575 m), and it is located at 43°32′36″N 99°55′17″W / 43.54333°N 99.92139°W / 43.54333; -99.92139 (43.5433299, -99.9215103). Although it is unincorporated, it has a post office, with the ZIP code of 57541.