Which ZIP code in Baltimore County has the fastest population growth?

21252 (Towson), at 104.2%, among 44 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.

Fastest-growing ZIP codes in Baltimore County, MD

These are the 25 ZIP codes in Baltimore County with the fastest population growth, out of 44 with at least 1,000 residents. 21252 (Towson, 104.2%), 21155 (Upperco, 30.8%) and 21250 (Baltimore, 19.7%) lead the list. There is no single "best" ZIP code in Baltimore County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Fastest-growing ZIP codes in Baltimore County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	21252	Towson	104.2%	4,865	12	—
2	21155	Upperco	30.8%	3,313	1,032	1,008
3	21250	Baltimore	19.7%	2,834	0	—
4	21152	Sparks Glencoe	18.3%	6,459	2,609	2,490
5	21013	Baldwin	17.7%	5,610	1,843	1,714
6	21128	Perry Hall	10.8%	15,501	5,609	6,193
7	21286	Towson	10.1%	21,853	9,765	10,721
8	21222	Dundalk	7.6%	59,407	22,512	23,157
9	21163	Woodstock	7.2%	7,539	2,680	2,794
10	21162	White Marsh	7.1%	4,639	1,559	1,856
11	21209	Baltimore	6.4%	30,126	11,621	12,261
12	21117	Owings Mills	5.9%	62,816	25,193	25,942
13	21030	Cockeysville	5.9%	25,827	10,900	12,135
14	21208	Pikesville	5.7%	37,276	15,735	15,601
15	21244	Windsor Mill	5.0%	38,208	14,157	15,420
16	21104	Marriottsville	5.0%	6,052	2,097	2,277
17	21120	Parkton	4.9%	7,440	2,599	2,652
18	21228	Catonsville	4.8%	50,492	19,788	19,846
19	21220	Middle River	4.3%	42,824	16,544	18,583
20	21237	Rosedale	4.3%	31,425	12,417	12,953
21	21227	Halethorpe	3.9%	34,907	13,396	—
22	21057	Glen Arm	3.6%	4,386	1,545	1,629
23	21221	Essex	3.3%	43,487	17,286	18,571
24	21102	Manchester	3.2%	12,162	4,413	4,295
25	21093	Lutherville Timonium	2.9%	39,100	15,688	16,590

How we ranked them

Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents. ZIP codes need at least 1,000 residents to be ranked; 44 of 54 qualify.

Which of these to mail, and why

Growing ZIP codes add households every year, which means new homes, new routes and customers without a go-to provider yet. Check the route map: new subdivisions can appear as new carrier routes.

The top five ZIP codes on this list hold 5,496 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 21252 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

Map it and price it

EDDM guides

Frequently asked questions

Which ZIP code in Baltimore County has the fastest population growth?: 21252 (Towson), at 104.2%, among 44 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have 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.

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