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Triadelphia

Ghost town · Montgomery County, Maryland

Rockville quadrangle, USGS topographic map (1908, 1:62,500)
Rockville quadrangle, USGS topographic map (1908, 1:62,500) · U.S. Geological Survey, Historical Topographic Map Collection · Public domain

Triadelphia is a ghost town in Montgomery County, Maryland. It is one of 8 former communities in Montgomery County on the federal names register. That ranks the county 9th among the 24 Maryland counties with a vanished settlement on record.

The U.S. Geological Survey lists Triadelphia as a historical populated place on the Sandy Spring topographic quadrangle: the name is no longer in official use for a community, whether the settlement was abandoned, absorbed into a neighbouring town or renamed. The recorded location is 39.2334° N, 77.0414° W.

Key facts

USGS quadrangleSandy Spring
Elevation352 ft
Nearest living townBrookeville, MD
Distance to it3.7 miles
GNIS feature ID598518
Coordinates39.23344, -77.04137

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What's there now

Triadelphia is no longer a community in its own right. The nearest living town is Brookeville, MD (population 148), about 3.7 miles away in a straight line, and the site sits at roughly 352 feet above sea level. Much of the land around former townsites is private; check access before you visit.

Nearby places

Questions

Where is Triadelphia?

Triadelphia is in Montgomery County, Maryland, at 39.2334, -77.0414.

How many ghost towns are in Montgomery County?

Montgomery County, Maryland has 8 ghost towns on record at Wayfarrow.

Sources and licences

Facts marked "approximately" carry an uncertain date in the source. Text on this page is generated from the sources above; no encyclopedia prose is copied. Last updated 2026-11-05.