ZIP codes

ZIP codes in Harford County, Maryland

Harford County has 24 ZIP codes. 18 lie entirely inside it and 6 are shared with neighboring counties, so part of their land and their people are elsewhere. About 264,138 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 24; With 1% or more of their land inside
Entirely inside: 18; 99% or more of their land
Shared with other counties: 6; Most with Baltimore County (6)
Most populated ZIP: 21014; 38,707 people · Bel Air North
Least populated ZIP: 21130; 112 people · Perryman
Largest ZIP by land: 21161; 49 sq mi

Map of the ZIP codes in Harford County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Harford County

24 ZIP codes in Harford County, MD, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
21001	Aberdeen	27,168	100%	27,168
21005	Aberdeen Proving Ground	2,202	100%	2,202
21009	Bel Air South	33,679	100%	33,679
21010	Edgewood	239	100%	239
21013	Fallston	5,610	29%	≈ 1,809
21014	Bel Air North	38,707	100%	38,707
21015	Bel Air South	30,013	100%	30,013
21017	Riverside	6,648	100%	6,648
21028	—	3,103	100%	3,103
21034	Darlington	2,846	100%	2,846
21040	Edgewood	24,960	100%	24,960
21047	Fallston	13,852	100%	13,852
21050	Bel Air North	17,466	100%	17,466
21078	Havre de Grace	20,030	100%	20,030
21082	Pleasant Hills	626	2.6%	≈ 44
21084	Jarrettsville	7,070	100%	7,070
21085	Joppatowne	17,307	94%	≈ 16,994
21087	Kingsville	5,537	9.9%	≈ 876
21111	—	4,714	23%	≈ 1,431
21130	Perryman	112	100%	112
21132	Pylesville	3,160	100%	3,160
21154	Pylesville	6,544	100%	6,544
21160	Pylesville	2,441	100%	2,441
21161	—	5,221	53%	≈ 2,744

ZIP codes shared with other counties

These 6 ZIP codes have part of their land in another county. The first figure is the share of their land in Harford County; then, where the rest lies.

21013 (Fallston): 29% here; 71% in Baltimore County.
21082 (Pleasant Hills): 2.6% here; 97% in Baltimore County.
21085 (Joppatowne): 94% here; 5.7% in Baltimore County.
21087 (Kingsville): 9.9% here; 90% in Baltimore County.
21111: 23% here; 77% in Baltimore County.
21161: 53% here; 47% in Baltimore County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Pylesville (3), Bel Air North (2), Bel Air South (2), Edgewood (2), Fallston (2), and Aberdeen (1); 15 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 210 and 211.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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