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

45810 (Ada), at 23.6 (±1.4), among 10 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 Hardin County, OH

These are the 10 ZIP codes in Hardin County with the lowest median age, out of 10 with at least 1,000 residents. 45810 (Ada, 23.6), 43340 (Mount Victory, 31.4) and 45850 (Harrod, 35.5) lead the list. There is no single "best" ZIP code in Hardin 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 Hardin County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	45810	Ada	23.6 ±1.4	7,449	2,531	2,753
2	43340	Mount Victory	31.4 ±9.9	2,103	655	540
3	45850	Harrod	35.5 ±4.4	3,559	1,311	1,441
4	45836	Dunkirk	35.5 ±7.6	1,573	639	564
5	45812	Alger	36.1 ±10.3	2,027	751	549
6	45896	Waynesfield	37.9 ±7.2	1,833	696	683
7	45843	Forest	40.4 ±5.2	4,184	1,613	—
8	43326	Kenton	42.0 ±2.4	12,573	5,173	5,580
9	43347	Rushsylvania	42.3 ±4.9	1,113	421	481
10	43310	Belle Center	42.5 ±6.9	3,177	1,323	1,419

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; 10 of 14 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 5,887 households, on 13 carrier routes with 5,847 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 45810 on the EDDM route map

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Frequently asked questions

Which ZIP code in Hardin County has the lowest median age?: 45810 (Ada), at 23.6 (±1.4), among 10 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.