ZIP Code 78257 — San Antonio city, TX Demographics & Data

ZIP code 78257 covers San Antonio, TX in Bexar County with a population of about 10,390.

At a glance, the area shows median age of 35.1 versus a U.S. median of about 38.9.

It sits in telephone area codes 210, 726; U.S. House district TX-23; the SAN ANTONIO media market.

Median household income in ZIP 78257 is about $74,540 — about even with the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 6.8%; unemployment rate near 1.5%; 56.3% of adults with a bachelor’s degree or higher (about 22.6 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Retail trade, Healthcare, and Professional services; about 13.6% of workers reporting work-from-home (about 1.6 points below the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Median home value is about $542,300 — about 56% above the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,546 (about 33% above the U.S. median rent ($1,163)), and owner-occupancy near 38.9% (about 26.5 points below the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 78257 in San Antonio, TX, a household would need roughly $149,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $3,484. That is about 100% above the local median household income ($74,540), so the median earner would likely stretch or need a larger down payment. Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

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 32.4 inches of annual precipitation.

IRS migration statistics show a net inflow of about 490 for ZIP 78257 (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.