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

78234 (Jbsa Ft Sam Houston), at 21.2 (±0.6), among 104 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 the San Antonio Area

These are the 25 ZIP codes in the San Antonio area with the lowest median age, out of 104 with at least 1,000 residents. 78234 (Jbsa Ft Sam Houston, 21.2), 78236 (Jbsa Lackland, 21.3) and 78235 (San Antonio, 27.5) lead the list. There is no single "best" ZIP code in the San Antonio area; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in the San Antonio area

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	78236	Jbsa Lackland	21.3 ±0.5	7,635	443	564
3	78235	San Antonio	27.5 ±2.4	2,304	1,134	1,847
4	78249	San Antonio	28.8 ±0.7	63,439	23,432	26,774
5	78224	San Antonio	29.4 ±3.7	22,232	6,878	9,413
6	78242	San Antonio	29.7 ±1.6	36,168	10,703	11,926
7	78229	San Antonio	29.8 ±1.3	35,664	16,401	17,282
8	78256	San Antonio	29.8 ±3.4	13,453	6,038	8,556
9	78252	San Antonio	31.2 ±2.0	21,790	6,626	12,865
10	78109	Converse	31.7 ±1.2	63,067	20,801	27,563
11	78147	Poth	31.9 ±6.3	1,532	589	—
12	78245	San Antonio	32.1 ±0.8	96,015	31,639	42,292
13	78244	San Antonio	32.6 ±0.8	38,092	12,387	14,082
14	78207	San Antonio	32.8 ±1.1	55,474	16,574	17,682
15	78253	San Antonio	33.0 ±1.0	69,282	23,370	39,086
16	78240	San Antonio	33.0 ±1.0	57,921	24,991	28,813
17	78254	San Antonio	33.1 ±0.9	77,893	24,789	32,596
18	78226	San Antonio	33.1 ±5.6	6,554	2,305	2,859
19	78251	San Antonio	33.2 ±2.1	59,435	22,275	24,502
20	78219	San Antonio	33.2 ±2.6	17,924	6,033	6,791
21	78203	San Antonio	33.4 ±5.8	5,200	1,802	2,403
22	78220	San Antonio	33.8 ±3.3	19,423	6,626	8,299
23	78221	San Antonio	34.0 ±2.0	42,178	13,264	16,162
24	78257	San Antonio	34.0 ±2.7	10,992	5,716	7,778
25	78152	Saint Hedwig	34.0 ±5.5	4,521	1,606	3,422

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; 104 of 121 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 32,922 households, on 39 carrier routes with 39,529 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

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in the San Antonio area has the lowest median age?: 78234 (Jbsa Ft Sam Houston), at 21.2 (±0.6), among 104 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.