Almgren is a Swedish surname. Notable people with the surname include:
Andreas Almgren (born 1995), Swedish middle- and long-distance runner Carl Eric Almgren (1913–2001), Swedish general and the army chief from 1969 to 1976 Erik Almgren (1908–1989), Swedish footballer and football manager Esko Almgren (born 1932), Finnish politician Frederick J. Almgren Jr. (1933–1997), American mathematician Johanna Almgren (born 1984), Swedish female footballer Oscar Almgren (1869–1945), Swedish archaeologist specializing in prehistoric archaeology