Wilhelmsen is a surname. Notable people with the surname include:
Arne Wilhelmsen (1929–2020), Norwegian businessman Frederick Wilhelmsen (1923–1996), American philosopher and professor in the Thomist tradition Lars Wilhelmsen (born 1946), Norwegian civil servant Thorvald Wilhelmsen (1912–1996), Norwegian long-distance runner, specialized in the 10,000 metres Tom Wilhelmsen (born 1983), former Major League Baseball relief pitcher Unni Wilhelmsen (born 1971), Norwegian singer, songwriter and musician
See also
Wallenius Wilhelmsen Logistics, privately owned Norwegian/Swedish shipping company Wilh. Wilhelmsen (WWH) is a global maritime industry group, headquartered in Lysaker, Norway