Which ZIP code in Carroll County has the highest median age?

21797 (Woodbine), at 45.3 (±3.6), among 14 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.

Oldest ZIP codes in Carroll County, MD

These are the 14 ZIP codes in Carroll County with the highest median age, out of 14 with at least 1,000 residents. 21797 (Woodbine, 45.3), 21102 (Manchester, 44.5) and 21776 (New Windsor, 44.1) lead the list. There is no single "best" ZIP code in Carroll County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Oldest ZIP codes in Carroll County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	21797	Woodbine	45.3 ±3.6	8,643	2,849	3,313
2	21102	Manchester	44.5 ±2.9	12,162	4,413	4,295
3	21776	New Windsor	44.1 ±6.5	6,261	2,346	2,091
4	21157	Westminster	43.2 ±1.4	38,984	14,785	15,042
5	21104	Marriottsville	43.1 ±4.2	6,052	2,097	2,277
6	21074	Hampstead	42.9 ±3.3	14,777	5,889	6,081
7	21048	Finksburg	41.7 ±2.3	10,481	3,723	4,112
8	21158	Westminster	41.6 ±2.4	22,083	8,451	8,114
9	21771	Mount Airy	40.9 ±1.7	33,031	11,226	11,089
10	21787	Taneytown	40.1 ±3.3	11,645	4,431	4,630
11	21784	Sykesville	38.9 ±1.0	39,258	13,416	14,941
12	21757	Keymar	37.8 ±5.3	2,671	1,018	1,097
13	21791	Union Bridge	37.7 ±4.9	5,340	1,968	1,829
14	21155	Upperco	33.7 ±7.6	3,313	1,032	1,008

How we ranked them

Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 14 of 14 qualify.

Which of these to mail, and why

Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.

The top five ZIP codes on this list hold 26,490 households, on 54 carrier routes with 27,018 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 21797 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 Carroll County has the highest median age?: 21797 (Woodbine), at 45.3 (±3.6), among 14 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, highest 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.