Each edition grades its towns against each other only.
Most of Rockville was built recently: 7% of its homes predate 1940 and the median home dates from 1975. Below: 1 old photo or paper, maps from 1919 on, and the census since 2000.
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how Rockville’s history is told.
Every edition of the U.S. Geological Survey’s map of Rockville. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Rockville.
From Wikipedia’s history of Rockville.
The Hanckel Mound, Horse Island, Rockville Historic District, and John Seabrook Plantation Bridge are listed on the National Register of Historic Places.
Rockville developed in the nineteenth century as a summer retreat for Lowcountry planters, and sailing was the predominant recreational activity from its earliest years.
Text from Wikipedia, licensed CC BY-SA 4.0.
Woven from the archive, old maps, post office records, the National Register and the people born here.
In the archivePresbyterian Church at Rockville
Born hereGeorge Swinton Legaré is born here
On the mapFirst mapped by the U.S. Geological SurveyOne decade in the archive so far: the 1860s. Scroll each row; tap a photo for its story.
No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.
Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Rockville’s page.
Retake this view · +15The country’s official list of buildings and places worth saving.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Between 134 and 141 people in every census since 2000.
3 censuses, 2000–2020.
U.S. Census Bureau decennial counts, from the census table on Rockville’s Wikipedia page.
Each neighbor’s History grade, on the same three inputs.
One place: the Rockville Historic District (listed 1972).
What the archives can’t tell you, neighbors can.
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 (4), the Library of Congress (1), the National Register of Historic Places (1), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.
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2007