Watertown-SD Airport
- URL: Official website
- Time zone: GMT -6
- Service telephone: +1 605 882-6209
- Address: Watertown Regional Airport, 2416 Boeing Avenue, Watertown, SD 57201, USA
- Operating company: City of Watertown
- Flight distribution on the days of the week: Monday (14.75%), Tuesday (13.11%), Wednesday (14.75%), Thursday (14.75%), Friday (14.75%), Saturday (13.11%), Sunday (14.75%)
- Alternative spelling: Watertown Regional Airport, Уотертаун, Южная Дакота, ウォータータウン (サウスダコタ州), 沃特敦 (南达科他州)