ZIP Code 78118 — Karnes City city, TX Demographics & Data

ZIP code 78118 covers Karnes City, TX in Karnes County with a population of about 4,097.

At a glance, the area shows median age of 37.5 (near the U.S. median).

It sits in telephone area code 830; U.S. House district TX-15; the SAN ANTONIO media market.

Median household income in ZIP 78118 is about $63,041 — about 16% below the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 19.6%; unemployment rate near 7.3%; 16.3% of adults with a bachelor’s degree or higher (about 17.4 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Retail trade, Mining, and Education; about 3.8% of workers reporting work-from-home (about 11.4 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 $115,100 — about 67% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $662 (about 43% below the U.S. median rent ($1,163)), and owner-occupancy near 72.7% (about 7.3 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 78118 in Karnes City, TX, a household would need roughly $32,000 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 $739. That sits below the local median household income ($63,041), suggesting the typical household income is closer to a workable buy-in level under these assumptions. 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 Karnes City city, TX as Relatively Low (composite score 58.4), which is near the middle of the national distribution. The strongest component scores on US5 are hurricane (85.1) and flood (63.8). 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 Karnes City city, TX show little to no average snow.

IRS migration statistics show a net inflow of about 193 for ZIP 78118 (Karnes City 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.