Which ZIP code in San Antonio has the lowest median age?

78234 (Jbsa Ft Sam Houston), at 21.2 (±0.6), among 63 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 San Antonio, TX

These are the 25 ZIP codes in San Antonio, TX with the lowest median age, out of 63 with at least 1,000 residents. 78234 (Jbsa Ft Sam Houston, 21.2), 78235 (San Antonio, 27.5) and 78249 (San Antonio, 28.8) lead the list. There is no single "best" ZIP code in San Antonio; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in San Antonio

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	78234	Jbsa Ft Sam Houston	21.2 ±0.6	7,149	1,035	931
2	78235	San Antonio	27.5 ±2.4	2,304	1,134	1,847
3	78249	San Antonio	28.8 ±0.7	63,439	23,432	26,774
4	78224	San Antonio	29.4 ±3.7	22,232	6,878	9,413
5	78242	San Antonio	29.7 ±1.6	36,168	10,703	11,926
6	78229	San Antonio	29.8 ±1.3	35,664	16,401	17,282
7	78256	San Antonio	29.8 ±3.4	13,453	6,038	8,556
8	78252	San Antonio	31.2 ±2.0	21,790	6,626	12,865
9	78109	Converse	31.7 ±1.2	63,067	20,801	27,563
10	78245	San Antonio	32.1 ±0.8	96,015	31,639	42,292
11	78244	San Antonio	32.6 ±0.8	38,092	12,387	14,082
12	78207	San Antonio	32.8 ±1.1	55,474	16,574	17,682
13	78253	San Antonio	33.0 ±1.0	69,282	23,370	39,086
14	78240	San Antonio	33.0 ±1.0	57,921	24,991	28,813
15	78254	San Antonio	33.1 ±0.9	77,893	24,789	32,596
16	78226	San Antonio	33.1 ±5.6	6,554	2,305	2,859
17	78251	San Antonio	33.2 ±2.1	59,435	22,275	24,502
18	78219	San Antonio	33.2 ±2.6	17,924	6,033	6,791
19	78203	San Antonio	33.4 ±5.8	5,200	1,802	2,403
20	78220	San Antonio	33.8 ±3.3	19,423	6,626	8,299
21	78221	San Antonio	34.0 ±2.0	42,178	13,264	16,162
22	78257	San Antonio	34.0 ±2.7	10,992	5,716	7,778
23	78227	San Antonio	34.1 ±2.0	44,035	14,074	17,189
24	78238	San Antonio	34.1 ±3.1	26,032	10,384	11,663
25	78073	Von Ormy	34.2 ±4.9	10,088	2,881	6,033

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; 63 of 64 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 43,182 households, on 48 carrier routes with 50,891 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 78234 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in San Antonio has the lowest median age?: 78234 (Jbsa Ft Sam Houston), at 21.2 (±0.6), among 63 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.