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

42274 (Rockfield), at 51.2 (±7.6), among 8 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, KY

These are the 8 ZIP codes in Warren County with the highest median age, out of 8 with at least 1,000 residents. 42274 (Rockfield, 51.2), 42159 (Oakland, 46.2) and 42122 (Alvaton, 43.4) 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	42274	Rockfield	51.2 ±7.6	2,157	929	1,010
2	42159	Oakland	46.2 ±9.2	1,699	971	483
3	42122	Alvaton	43.4 ±2.3	5,513	1,987	2,541
4	42103	Bowling Green	41.8 ±4.2	21,911	9,944	11,769
5	42171	Smiths Grove	41.3 ±3.9	6,723	2,631	3,356
6	42104	Bowling Green	37.0 ±1.4	42,076	17,045	16,735
7	42170	Woodburn	31.3 ±19.9	1,938	594	591
8	42101	Bowling Green	28.1 ±1.0	65,421	24,361	27,169

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; 8 of 8 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 16,462 households, on 35 carrier routes with 19,159 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 42274 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Warren County has the highest median age?: 42274 (Rockfield), at 51.2 (±7.6), among 8 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.