Dahlgren may refer to:
Places Dahlgren, Illinois Dahlgren, Virginia Naval Surface Warfare Center Dahlgren Division Dahlgren Township, Carver County, Minnesota Dahlgren Township, Hamilton County, Illinois Dahlgrens Corner, Virginia Dahlgren Chapel (Maryland) Dahlgren Chapel of the Sacred Heart, at Georgetown University Dahlgren Hall at the U.S. Naval Academy in Annapolis, Maryland Dahlgren Railroad Heritage Trail in King George County, Virginia Lake Dahlgren, small lake situated southeast of Noble, Oklahoma Dahlgren River, river of Minnesota
Other uses Dahlgren (surname), a Swedish surname Dahlgren gun, type of smooth bore cannon designed by the Admiral and used by the U.S. Navy Dahlgren Affair, failed mission to assassinate leaders of the Confederacy Dahlgren system and dahlgrenogram, created by Swedish-Danish botanist Rolf M. T. Dahlgren (1932–1987) , Torpedo Boat No. 9/TB-9/Coast Torpedo Boat No. 4 6945 Dahlgren (1980 FZ3), Main-belt Asteroid discovered on March 16, 1980 by Lagerkvist, C.-I. at La Silla Dahlgren Chapel (disambiguation) Dahlgren (fireboat), operated in Annapolis, Maryland, built by MetalCraft Marine
See also Dhalgren, a science fiction novel by Samuel R. Delany