Which ZIP code in Butler County has the lowest median age?

45056 (Oxford), at 21.6 (±0.3), 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.

Youngest ZIP codes in Butler County, OH

These are the 14 ZIP codes in Butler County with the lowest median age, out of 14 with at least 1,000 residents. 45056 (Oxford, 21.6), 45044 (Middletown, 36.8) and 45050 (Monroe, 36.8) lead the list. There is no single "best" ZIP code in Butler County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in Butler County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	45056	Oxford	21.6 ±0.3	27,376	8,371	9,313
2	45044	Middletown	36.8 ±1.6	56,217	20,589	22,282
3	45050	Monroe	36.8 ±1.9	12,248	4,288	4,570
4	45067	Trenton	37.0 ±4.7	15,471	5,471	5,643
5	45013	Hamilton	37.4 ±1.7	53,998	20,404	22,772
6	45014	Fairfield	38.0 ±1.7	45,773	18,888	19,387
7	45015	Hamilton	38.1 ±3.6	11,038	4,914	5,018
8	45069	West Chester	38.3 ±1.2	56,037	21,173	22,488
9	45053	Okeana	38.4 ±5.4	3,718	1,211	—
10	45011	Hamilton	39.2 ±1.1	75,864	27,100	27,983
11	45246	Cincinnati	39.7 ±3.8	13,527	5,906	7,088
12	45042	Middletown	41.6 ±2.0	27,652	11,578	11,974
13	45064	Somerville	44.7 ±3.5	3,373	1,143	1,060
14	45241	Cincinnati	45.6 ±3.1	23,955	10,651	10,692

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 14 of 17 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 59,123 households, on 98 carrier routes with 64,580 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 45056 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 Butler County has the lowest median age?: 45056 (Oxford), at 21.6 (±0.3), among 14 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest 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.