San Antonio Population Density: 2020 Census Analysis
According to the 2020 U.S. Census, San Antonio, Texas has a population density of:
| Metric | Value |
|---|
| Population | 1,434,625 |
| Land Area | 460.93 sq mi (1,193.8 km²) |
| Population Density | 3,112 people/sq mi (1,201 people/km²) |
Context & Comparison
| City | Density (pop/sq mi) | Notes |
|---|
| New York City | 29,303 | 5 boroughs |
| San Francisco | 18,633 | Small land area |
| Chicago | 12,059 |
| Philadelphia | 11,933 |
San Antonio3,112 | Large annexation area |
| Houston | 3,623 | Similar sprawl pattern |
| Phoenix | 3,119 | Nearly identical |
| Dallas | 3,928 |
| Austin | 3,006 |
Why San Antonio's Density Is Moderate
- Aggressive annexation: Texas law allows cities to annex unincorporated land; SA added 200+ sq mi since 1990
- Low-density development: Single-family zoning, large lots, highway-oriented growth (Loop 1604, I-35, I-10)
- Military bases: JBSA (Fort Sam, Lackland, Randolph) = 47 sq mi low-density federal land
- Geography: Balcones Escarpment limits dense development north/west
Internal Variation
- Inner City (Districts 1, 2, 5): 6,000–10,000/sq mi (pre-1950 grid)
- Suburban (Districts 6–10): 2,000–4,000/sq mi
- Far North/West (ETJ): <1,000/sq mi (recent master-planned)
Trends
- 2010 density: 2,880/sq mi → +8% (population grew faster than land area)
- SA2020/SA Tomorrow plans: Infill, transit-oriented development, missing middle housing
- 2023 estimate: 1,495,000 → density ~3,240/sq mi
San Antonio's density reflects its history as a sprawling Sun Belt city—but is slowly intensifying.
Wanderlust World