Youngest ZIP codes in Preble County, OH
These are the 8 ZIP codes in Preble County with the lowest median age, out of 8 with at least 1,000 residents. 45321 (Eldorado, 29.1), 45338 (Lewisburg, 39.3) and 45381 (West Alexandria, 42.4) lead the list. There is no single "best" ZIP code in Preble 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 Preble County
| Rank | ZIP | Mailing city | Median age | Residents | Households | Residential mailboxes |
|---|---|---|---|---|---|---|
| 1 | 45321 | Eldorado | 29.1 ±3.7 | 1,272 | 424 | 159 |
| 2 | 45338 | Lewisburg | 39.3 ±2.0 | 4,761 | 1,835 | 1,955 |
| 3 | 45381 | West Alexandria | 42.4 ±3.5 | 5,626 | 2,301 | 2,214 |
| 4 | 45347 | New Paris | 43.3 ±4.9 | 4,095 | 1,787 | 1,830 |
| 5 | 45320 | Eaton | 44.1 ±1.6 | 15,454 | 6,659 | 6,710 |
| 6 | 45064 | Somerville | 44.7 ±3.5 | 3,373 | 1,143 | 1,060 |
| 7 | 45311 | Camden | 46.2 ±2.0 | 5,701 | 2,257 | — |
| 8 | 45382 | West Manchester | 46.3 ±5.1 | 1,154 | 478 | 295 |
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; 8 of 12 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 13,006 households, on 23 carrier routes with 12,868 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.
Open 45321 on the EDDM route map
More rankings
- Richest ZIP codes in Preble County
- ZIP codes with the highest home values in Preble County
- ZIP codes with the highest homeownership in Preble County
- ZIP codes with the most families with kids in Preble County
- ZIP codes with the most new movers in Preble County
- Oldest ZIP codes in Preble County
- Fastest-growing ZIP codes in Preble County
- All Preble County ZIP codes
Businesses that mail these ZIP codes
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EDDM guides
Frequently asked questions
- Which ZIP code in Preble County has the lowest median age?
- 45321 (Eldorado), at 29.1 (±3.7), among 8 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.