Dahlgren was established in spring 1918 as a Naval Proving Ground. Its recorded first work, the firing of a 7-inch (178-millimetre)/45 caliber tractor-mounted gun, occurred on 16 October 1918, which is recognized as the official founding date. The proving ground was named to honor Rear Admiral John Adolphus Dahlgren, a Civil War Navy commander and the "father of modern naval ordnance."
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Every edition of the U.S. Geological Survey’s map of Dahlgren Center. Tap a year, or press play to watch the town change.
1948Nanjemoy sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Dahlgren Center.
Then & now
Stand where they stood
No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.
Retake this viewGun display at Dahlgren Naval Weapons Facility c1968, c. 1968
Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Dahlgren Center’s page.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikimedia Commons (30), Wikipedia, U.S. Geological Survey historical maps and the US Post Offices dataset (Blevins & Helbock). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.