Skip to main content
USAvizUSAviz

Local data snapshots and weekly insights for every place in America.

Explore

  • Insights
  • Search
  • Browse states
  • Browse metros

Company

  • About
  • Methodology
  • Sources
  • Embed Our Data
  • Contact
Privacy·Terms·Do Not Sell or Share

© 2026 USAviz.com. All rights reserved.

USAvizUSAviz
Insights
About
Home
78221
  1. Home
  2. ZIP Codes
  3. ZIP Code 78221
Texas (TX)Bexar CountySan Antonio-New Braunfels210726

ZIP Code 78221 — San Antonio, TX

Bexar County * San Antonio-New Braunfels metro

Compare

42.2K

Population

$63.8K

Median income

per household

$171.2K

Home value

17.3%

Poverty rate

What stands out

  • Median household income: $63.8K.
  • Median home value: $171.2K.
  • Poverty rate: 17.3% (high poverty; top quartile vs US ZIP codes).

Categories vs U.S.

Economy

0 of 5 metrics better than U.S. benchmarks

Rental strain: 67.5% of renter households are rent-burdened (≥30% of income).

Median household income

$63.8K

U.S.

$81K

Per-capita income

$24.4K

U.S.

$45K

Median home value

$171.2K

U.S.

$333K

Housing stress

Rent-burdened renters (≥30%)

67.5%

U.S.

51.1%

Severely rent-burdened (≥50%)

32.9%

U.S.

25.9%

Affordability Ratios

Rent-to-Income

23.1%

Below 30% threshold

Home-Value-to-Income

2.7×

Within typical 3-5x range

Income distribution

Share of households by income bracket (ACS).

< $50k
40.5%
$50–100k
32.0%
$100–200k
25.1%
$200k+
2.4%

Health

0 of 6 available metrics better than U.S.

CDC PLACES modeled ZCTA-level estimates (adult prevalence).

Obesity

37.3%

U.S.

33.3%

Diabetes

17.8%

U.S.

12.0%

Current smoking

13.9%

U.S.

13.1%

Connectivity

3 of 3 metrics better than U.S.

Best available speed

1,000Mbps

Gigabit speeds reported

100+ Mbps coverage

97.6%

U.S.

85.3%

Gigabit ready

71.0%

U.S.

8.6%

5G available

99.7%

U.S.

77.4%

Learning

Education metrics come from ACS 5-year estimates for ZIP Code Tabulation Areas (ZCTAs).

Bachelor's degree+ (age 25+)

12.2%

U.S.

35.7%

ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as noise.

School districts

Southside Independent School District

Map

ZIP 78221

San Antonio, TX

Population

42.2K

Area

36.3 sq mi

Density

1.2K/sq mi

Neighbors

781127821178214782237822478264
More Details

Census Tracts

12 tracts overlap this ZIP. Hover over segments to explore.

35%
27%
14%
6%
+7

Tract 1519

35.3%

Tract 1522.01

26.5%

Tract 1521

14.1%

Tract 1517

6.3%

Tract 1520

4.6%

Others (7)

12.7%

Total tracts: 12Coverage: 99.5%

Representation

U.S. House

ZIP codes can span multiple congressional districts. Overlap percentages are approximate by land area. Verify by address.

69%
18%
12%

TX-28

69.4%

TX-23

18.4%

TX-20

12.1%

Districts: 3Coverage: 99.9%

Data freshness

ACS 5-Year
2020–2024
CDC PLACES
2025
Broadband
2020-12
Mobile
2025-11-24
Page Updated
2026-02-23

Release schedule and upstream dates: Sources.

Data sources

US Census Bureau (ACS 5-year)HUD USPS ZIP crosswalkUS Census TIGER/Line (geometry inputs)US Census TIGER/Line (school districts)US Census Bureau (ZCTA-to-tract relationship, 2020)US Census Bureau (2020 ZCTA-to-congressional-district relationship file, CD119)CDC PLACES (ZCTA)FCC (Form 477 broadband)FCC (Mobile Broadband Data Collection)

Derived statistics

  • ZIP pages use Census ZIP Code Tabulation Areas (ZCTAs), not USPS delivery routes.
  • Population density is computed as population ÷ land area.
  • Overlap percentages (tracts and districts) are derived from map geometry and are approximate.

Data accuracy & methodology

ZIP pages combine 2020–2024 ACS 5-year ZCTA estimates with other public datasets when available (see Sources). Connectivity metrics use FCC coverage data, not ACS. ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as statistical noise rather than precise changes.