Källström is a Swedish surname, simplified Kallstrom. Notable people with the surname include: Kim Källström (born 1982), Swedish footballer Harry Källström (1939–2009), Swedish professional rally driver James Kallstrom (1943–2021), American Federal Bureau of Investigation (FBI) agent See also Marjo Matikainen-Kallström (born 1965), former Finnish cross-country skier Swedish-language surnames