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

21521 (Barton), at 27.0%, among 9 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 Allegany County, MD

These are the 9 ZIP codes in Allegany County with the fastest population growth, out of 9 with at least 1,000 residents. 21521 (Barton, 27.0%), 21557 (Rawlings, 5.0%) and 21545 (Mount Savage, -2.6%) lead the list. There is no single "best" ZIP code in Allegany 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 Allegany County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	21521	Barton	27.0%	1,400	568	311
2	21557	Rawlings	5.0%	1,481	715	691
3	21545	Mount Savage	-2.6%	1,694	709	677
4	21502	Cumberland	-3.2%	41,015	16,268	17,130
5	21532	Frostburg	-7.3%	13,647	5,511	6,349
6	21555	Oldtown	-7.3%	1,470	591	745
7	21562	Westernport	-13.8%	3,032	1,256	1,189
8	21539	Lonaconing	-24.2%	1,975	885	1,095
9	21530	Flintstone	-24.5%	1,404	648	644

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; 9 of 16 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 23,771 households, on 50 carrier routes with 25,158 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 21521 on the EDDM route map

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Frequently asked questions

Which ZIP code in Allegany County has the fastest population growth?: 21521 (Barton), at 27.0%, among 9 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.