Which ZIP code in St. Louis has the lowest median age?

63106 (Saint Louis), at 32.6 (±4.2), among 20 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 St. Louis, MO

These are the 20 ZIP codes in St. Louis, MO with the lowest median age, out of 20 with at least 1,000 residents. 63106 (Saint Louis, 32.6), 63103 (Saint Louis, 33.0) and 63112 (Saint Louis, 33.4) lead the list. There is no single "best" ZIP code in St. Louis; 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. Louis

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	63106	Saint Louis	32.6 ±4.2	6,751	3,342	4,800
2	63103	Saint Louis	33.0 ±1.8	8,778	5,204	5,533
3	63112	Saint Louis	33.4 ±2.8	17,985	9,094	10,520
4	63102	Saint Louis	33.6 ±5.7	2,882	1,753	1,800
5	63108	Saint Louis	33.7 ±1.5	21,336	11,414	14,454
6	63120	Saint Louis	33.8 ±3.9	6,790	2,722	2,923
7	63143	Saint Louis	34.7 ±1.9	8,975	4,825	5,187
8	63118	Saint Louis	34.9 ±1.0	25,913	12,138	11,093
9	63110	Saint Louis	35.0 ±1.0	17,645	9,156	10,195
10	63111	Saint Louis	35.5 ±1.6	18,851	8,959	8,614
11	63137	Saint Louis	35.8 ±2.7	19,684	8,104	7,527
12	63116	Saint Louis	36.3 ±1.1	42,170	19,900	18,720
13	63139	Saint Louis	36.5 ±1.8	21,631	11,501	12,772
14	63101	Saint Louis	37.1 ±8.0	3,130	2,130	2,706
15	63104	Saint Louis	37.3 ±2.3	19,007	9,888	10,469
16	63109	Saint Louis	41.0 ±1.7	25,236	14,080	14,735
17	63107	Saint Louis	43.9 ±3.4	8,909	4,001	4,003
18	63115	Saint Louis	44.1 ±5.3	14,488	6,953	6,643
19	63147	Saint Louis	47.5 ±3.8	8,173	3,620	3,649
20	63113	Saint Louis	48.6 ±4.6	10,221	4,841	4,863

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; 20 of 21 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 30,807 households, on 66 carrier routes with 37,107 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 63106 on the EDDM route map

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Frequently asked questions

Which ZIP code in St. Louis has the lowest median age?: 63106 (Saint Louis), at 32.6 (±4.2), among 20 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.