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

45054 (Oregonia), at 52.5 (±3.5), among 16 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 Warren County, OH

These are the 16 ZIP codes in Warren County with the highest median age, out of 16 with at least 1,000 residents. 45054 (Oregonia, 52.5), 45162 (Pleasant Plain, 46.5) and 45068 (Waynesville, 43.8) lead the list. There is no single "best" ZIP code in Warren 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 Warren County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	45054	Oregonia	52.5 ±3.5	2,693	1,186	972
2	45162	Pleasant Plain	46.5 ±3.9	2,754	1,060	1,025
3	45068	Waynesville	43.8 ±3.8	11,597	4,369	4,429
4	45122	Goshen	41.9 ±5.8	10,977	4,166	4,702
5	45458	Dayton	41.7 ±1.5	38,712	15,700	16,588
6	45140	Loveland	41.6 ±1.9	57,211	22,015	22,660
7	45040	Mason	41.5 ±1.0	59,518	22,000	22,511
8	45036	Lebanon	40.0 ±1.2	42,204	14,553	16,180
9	45039	Maineville	39.5 ±1.7	28,335	10,945	11,748
10	45005	Franklin	39.4 ±2.2	32,251	12,611	13,998
11	45066	Springboro	38.7 ±1.6	27,545	9,708	10,349
12	45107	Blanchester	37.4 ±3.6	9,190	3,293	3,964
13	45113	Clarksville	37.2 ±6.9	3,877	1,517	1,545
14	45050	Monroe	36.8 ±1.9	12,248	4,288	4,570
15	45152	Morrow	36.2 ±3.9	14,850	4,805	6,147
16	45065	South Lebanon	35.0 ±4.2	7,053	2,359	2,838

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; 16 of 18 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 26,481 households, on 47 carrier routes with 27,716 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 45054 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Warren County has the highest median age?: 45054 (Oregonia), at 52.5 (±3.5), among 16 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.