Dahlgren is a Swedish surname. Notable people with the surname include:
Anders Dahlgren (1925–1986), Swedish politician who was a member of the Centre PartyCharles G. Dahlgren (1811–1888), Confederate brigadier general during the American Civil WarCornelia Dahlgren, Swedish singer and songwriterDagmar Dahlgren (1880–1951), American singer and silent film era motion picture actressBabe Dahlgren (1912–1996), American baseball playerEdward C. Dahlgren (1916–2006), United States Army soldierEva Dahlgren (born 1960), Swedish singerFredrik August Dahlgren (1816–1895) Swedish writer, playwright and songwriterGeorge Dahlgren (1887–1940), player in the National Football LeagueGertrud Dahlgren (1931–2009), Swedish botanistJay Dahlgren (born 1948), Canadian javelin throwerJeff Dahlgren, American guitarist and producerJennifer Dahlgren (born 1984), Argentinian athleteJohn A. Dahlgren (1809–1870), Rear Admiral, U.S. Navy officerJohn Olof Dahlgren (1872–1963), American Medal of Honor recipientKarl Fredrik Dahlgren (1791–1844), Swedish poetKristen Dahlgren, American NBC reporterLeif Dahlgren (1906–1998), Swedish decathleteMathias Dahlgren (born 1969), Swedish chef, who won the culinary championship Bocuse d'Or in 1997Mikael Dahlgren (born 1984), Swedish footballer who currently plays for Landskrona BoISRobert Dahlgren (born 1979), Swedish auto racing driverRolf Dahlgren (1932–1987), Swedish-Danish botanistTom Dahlgren (born 1933), American actorUlric Dahlgren (1842–1864), Colonel, U.S. Army officerSara Dahlgren (born 1980), Swedish singer and actress