Tool

ZIP Codes Within a Radius

Enter a ZIP code and a distance. The tool lists every residential ZIP code whose center (the Census Bureau's internal point of its area) lies within that many miles, nearest first. PO Box and single-organization codes have no area of their own, so they are not placed.

9 other ZIP codes within 10 miles of 21791

The 10-mile circle around 21791's center; residential ZIP codes centered inside it, shaded by median household income in national fifths (ACS 2020-2024); the others are outlined. <$54k$98k+no figureZIP codes centered outside the circle

Distance between internal points, in miles
ZIP	Town	People	Miles
21791	Union Bridge, MD	5,340	0.0
21762	Libertytown, MD	139	4.8
21776	New Windsor, MD	6,261	4.8
21757	Keymar, MD	2,671	5.6
21798	Woodsboro, MD	2,928	5.7
21793	Walkersville, MD	10,719	8.8
21778	Rocky Ridge, MD	745	9.4
21774	New Market, MD	17,134	9.6
21771	Mount Airy, MD	33,031	9.7
21701	Frederick, MD	43,048	9.9

Source: U.S. Census Bureau, 2023 Gazetteer internal points (2020 ZCTAs); GeoNames postal codes (CC BY 4.0) for a PO Box origin's town. Straight-line distance, not driving distance.