← Who holds officeSouth DakotaMike RoundsU.S. Senator from South DakotaRepublicanPartyRepublicanOfficeU.S. Senator from South DakotaIn this chamber since2015Current term endsJanuary 2027Official websiterounds.senate.govPhone202-224-5842Washington office716 Hart Senate Office Building Washington DC 20510Official portrait: U.S. Government Publishing Office, public domain. Service record: the public congress-legislators dataset.