Youngest ZIP codes in St. Joseph, MO
These are the 6 ZIP codes in St. Joseph, MO with the lowest median age, out of 6 with at least 1,000 residents. 64507 (Saint Joseph, 35.7), 64501 (Saint Joseph, 35.8) and 64504 (Saint Joseph, 38.9) lead the list. There is no single "best" ZIP code in St. Joseph; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.
Youngest ZIP codes in St. Joseph
| Rank | ZIP | Mailing city | Median age | Residents | Households | Residential mailboxes |
|---|---|---|---|---|---|---|
| 1 | 64507 | Saint Joseph | 35.7 ±3.1 | 13,991 | 5,514 | — |
| 2 | 64501 | Saint Joseph | 35.8 ±2.6 | 10,689 | 4,254 | — |
| 3 | 64504 | Saint Joseph | 38.9 ±4.0 | 10,068 | 3,888 | 3,994 |
| 4 | 64503 | Saint Joseph | 40.4 ±3.2 | 11,954 | 5,103 | — |
| 5 | 64506 | Saint Joseph | 40.6 ±3.0 | 21,461 | 8,897 | 9,400 |
| 6 | 64505 | Saint Joseph | 41.1 ±2.4 | 14,107 | 5,266 | — |
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; 6 of 6 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 27,656 households. Open any of them on the route map to see each carrier route's own figures before you choose.
Open 64507 on the EDDM route map
More rankings
- Richest ZIP codes in St. Joseph
- ZIP codes with the highest home values in St. Joseph
- ZIP codes with the highest homeownership in St. Joseph
- ZIP codes with the most families with kids in St. Joseph
- ZIP codes with the most new movers in St. Joseph
- Oldest ZIP codes in St. Joseph
- Fastest-growing ZIP codes in St. Joseph
- Youngest ZIP codes in Buchanan County
- All St. Joseph ZIP codes
Businesses that mail these ZIP codes
Map it and price it
EDDM guides
Frequently asked questions
- Which ZIP code in St. Joseph has the lowest median age?
- 64507 (Saint Joseph), at 35.7 (±3.1), among 6 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.