Which ZIP code in Saint Louis has the lowest median age?

63134 (Saint Louis), at 28.7 (±3.9), among 44 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 Saint Louis, MO

These are the 25 ZIP codes in Saint Louis, MO with the lowest median age, out of 44 with at least 1,000 residents. 63134 (Saint Louis, 28.7), 63105 (Saint Louis, 31.0) and 63106 (Saint Louis, 32.6) lead the list. There is no single "best" ZIP code in Saint 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 Saint Louis

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	63134	Saint Louis	28.7 ±3.9	13,059	4,851	5,287
2	63105	Saint Louis	31.0 ±1.7	18,875	7,088	7,515
3	63106	Saint Louis	32.6 ±4.2	6,751	3,342	4,800
4	63103	Saint Louis	33.0 ±1.8	8,778	5,204	5,533
5	63138	Saint Louis	33.1 ±2.6	18,233	7,339	7,398
6	63121	Saint Louis	33.2 ±2.1	25,008	11,142	10,903
7	63112	Saint Louis	33.4 ±2.8	17,985	9,094	10,520
8	63102	Saint Louis	33.6 ±5.7	2,882	1,753	1,800
9	63108	Saint Louis	33.7 ±1.5	21,336	11,414	14,454
10	63120	Saint Louis	33.8 ±3.9	6,790	2,722	2,923
11	63143	Saint Louis	34.7 ±1.9	8,975	4,825	5,187
12	63118	Saint Louis	34.9 ±1.0	25,913	12,138	11,093
13	63110	Saint Louis	35.0 ±1.0	17,645	9,156	10,195
14	63111	Saint Louis	35.5 ±1.6	18,851	8,959	8,614
15	63130	Saint Louis	35.6 ±2.3	28,910	12,580	12,990
16	63137	Saint Louis	35.8 ±2.7	19,684	8,104	7,527
17	63135	Saint Louis	35.9 ±3.5	18,381	7,997	8,147
18	63144	Saint Louis	36.0 ±3.1	9,505	4,769	4,919
19	63117	Saint Louis	36.0 ±2.3	9,261	4,440	5,025
20	63116	Saint Louis	36.3 ±1.1	42,170	19,900	18,720
21	63139	Saint Louis	36.5 ±1.8	21,631	11,501	12,772
22	63136	Saint Louis	37.1 ±2.1	40,929	17,457	17,760
23	63101	Saint Louis	37.1 ±8.0	3,130	2,130	2,706
24	63104	Saint Louis	37.3 ±2.3	19,007	9,888	10,469
25	63114	Saint Louis	37.5 ±1.6	33,969	15,031	15,082

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; 44 of 45 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 27,824 households, on 73 carrier routes with 30,533 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 63134 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 Saint Louis has the lowest median age?: 63134 (Saint Louis), at 28.7 (±3.9), among 44 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.