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

18343 (Mount Bethel), at 54.2 (±3.1), among 19 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 Northampton County, PA

These are the 19 ZIP codes in Northampton County with the highest median age, out of 19 with at least 1,000 residents. 18343 (Mount Bethel, 54.2), 18088 (Walnutport, 50.0) and 18038 (Danielsville, 48.9) lead the list. There is no single "best" ZIP code in Northampton 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 Northampton County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	18343	Mount Bethel	54.2 ±3.1	3,637	1,561	1,708
2	18088	Walnutport	50.0 ±3.4	8,488	3,296	3,763
3	18038	Danielsville	48.9 ±4.5	3,549	1,395	1,201
4	18072	Pen Argyl	47.8 ±4.9	6,938	2,729	2,785
5	18055	Hellertown	46.1 ±2.9	12,117	4,703	5,317
6	18091	Wind Gap	45.9 ±2.9	6,547	2,673	2,724
7	18064	Nazareth	45.5 ±1.5	26,970	10,477	10,536
8	18045	Easton	45.4 ±2.0	30,429	12,115	13,139
9	18067	Northampton	45.3 ±2.1	19,590	7,902	8,770
10	18040	Easton	45.2 ±2.7	17,256	6,668	7,229
11	18017	Bethlehem	45.0 ±1.4	40,640	16,597	16,654
12	18014	Bath	44.7 ±2.3	12,097	4,617	5,275
13	18020	Bethlehem	42.8 ±4.6	21,204	7,791	8,347
14	18013	Bangor	41.6 ±2.2	17,597	6,755	7,591
15	18032	Catasauqua	41.0 ±1.9	9,555	4,083	4,152
16	18018	Bethlehem	39.2 ±1.9	32,965	14,119	15,396
17	18085	Tatamy	38.9 ±3.8	1,175	387	—
18	18042	Easton	34.7 ±1.1	45,532	16,376	17,725
19	18015	Bethlehem	31.2 ±1.9	34,852	12,150	12,997

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; 19 of 24 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 13,684 households, on 26 carrier routes with 14,774 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 18343 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 Northampton County has the highest median age?: 18343 (Mount Bethel), at 54.2 (±3.1), among 19 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.