THE ROSEMONT LAND BRIEF
Land in the
Piedmont Uplands setting.
Rosemont CDP has 0.82 square miles of land in Delaware County, Montgomery County. Its Census reference point is in Piedmont Uplands, within Northern Piedmont.
Rounded low hills, open valleys and irregular plains form a transition between Appalachian highlands and the coastal plain. The underlying geology mixes metamorphic, igneous and sedimentary rocks.
Regional context: Northern Piedmont ↗ · Classification at the Census reference point
One place name. 2 county geographies.
Rosemont intersects 2 county geographies: Delaware County, Montgomery County. A Rosemont mailing address alone cannot choose the right record office; use the county and parcel identifier on the tax bill or deed.
Rosemont by land and water
The Census records 0 square miles of water within Rosemont, or 0% of its total area. It is 2.8 percentage points lower than the 2.8% recorded for Pennsylvania. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Rosemont CDP has 85.8% of the land area of nearby Bryn Mawr CDP (0.96 square miles). These areas describe boundaries, not comparable property prices.

