ZIP Code 78234 — San Antonio city, TX Demographics & Data

ZIP code 78234 covers San Antonio, TX in Bexar County with a population of about 6,281.

At a glance, the area shows median age of 21.0 versus a U.S. median of about 38.9.

It sits in telephone area codes 210, 726; U.S. House district TX-21; the SAN ANTONIO media market.

San Antonio, TX reads as a military / base-oriented community on US5’s intent model (curated intent tag for zip 78234). Service members and families often look up Basic Allowance for Housing (BAH) rates, on-base mail (PSC / P.O. Box) addresses, and nearby ZIP demographics when relocating.

US5 shows 2026 DoD BAH locality rates for this ZIP’s Military Housing Area on this page (pay grade × with/without dependents). Treat the table as a planning reference and confirm entitlement with your finance office or the official DTMO BAH lookup.

Median household income in ZIP 78234 is about $100,096 — about 33% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 10.7%; unemployment rate near 7.6%; 50.2% of adults with a bachelor’s degree or higher (about 16.5 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Food services, Education, and Retail trade; about 31.1% of workers reporting work-from-home (about 15.9 points above the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Housing tenure and rents show median gross rent around $2,186 (about 88% above the U.S. median rent ($1,163)), and owner-occupancy near 0.4% (about 65.0 points below the national owner-occupancy rate (65.4%)).

FEMA’s National Risk Index rates natural-hazard risk for San Antonio city, TX as Relatively High (composite score 99.4), which is among the highest nationally. The strongest component scores on US5 are flood (99.7) and wildfire (92.4). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Climate normals for San Antonio city, TX show little to no average snow and around 34.0 inches of annual precipitation.

IRS migration statistics show a net inflow of about 296 for ZIP 78234 (San Antonio city, TX) on US5’s published series — a signal of people/tax filers moving in relative to those leaving. Inflows often track job growth, housing demand, or lifestyle migration; treat the figure as a directional indicator rather than a precise headcount.