Which ZIP code in Harford County has the lowest median age?

21005 (Aberdeen Proving Ground), at 33.1 (±2.8), among 20 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Youngest ZIP codes in Harford County, MD

These are the 20 ZIP codes in Harford County with the lowest median age, out of 20 with at least 1,000 residents. 21005 (Aberdeen Proving Ground, 33.1), 21009 (Abingdon, 36.2) and 21040 (Edgewood, 36.4) lead the list. There is no single "best" ZIP code in Harford County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in Harford County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	21005	Aberdeen Proving Ground	33.1 ±2.8	2,202	835	1,010
2	21009	Abingdon	36.2 ±1.1	33,679	12,940	12,564
3	21040	Edgewood	36.4 ±3.4	24,960	9,795	9,430
4	21017	Belcamp	37.6 ±1.6	6,648	2,669	2,777
5	21001	Aberdeen	37.7 ±1.3	27,168	11,204	12,341
6	21015	Bel Air	40.4 ±1.5	30,013	11,012	12,380
7	21013	Baldwin	40.7 ±5.3	5,610	1,843	1,714
8	21132	Pylesville	41.0 ±2.1	3,160	1,072	1,025
9	21014	Bel Air	41.3 ±1.2	38,707	15,143	15,327
10	21085	Joppa	42.3 ±2.8	17,307	6,801	7,391
11	21084	Jarrettsville	44.0 ±6.1	7,070	2,724	2,745
12	21050	Forest Hill	44.1 ±2.3	17,466	6,422	7,054
13	21028	Churchville	44.6 ±4.4	3,103	1,066	1,200
14	21034	Darlington	45.1 ±6.3	2,846	1,132	1,404
15	21047	Fallston	45.4 ±3.9	13,852	4,810	4,844
16	21161	White Hall	46.7 ±3.1	5,221	1,887	2,087
17	21078	Havre De Grace	46.8 ±2.4	20,030	8,476	9,237
18	21111	Monkton	48.7 ±3.6	4,714	1,908	1,915
19	21154	Street	50.0 ±3.9	6,544	2,403	2,336
20	21160	Whiteford	52.7 ±16.1	2,441	968	960

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 20 of 22 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 37,443 households, on 53 carrier routes with 38,122 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 21005 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Harford County has the lowest median age?: 21005 (Aberdeen Proving Ground), at 33.1 (±2.8), among 20 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.