Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.
ZIP code 78674 covers Weir, TX in Williamson County with a population of about 195.
At a glance, the area shows median age of 37.6 (near the U.S. median).
It sits in telephone area codes 512, 737; U.S. House district TX-31; the AUSTIN media market.
Median household income in ZIP 78674 is about $95,481 — about 27% above the U.S. median ($75,149).
On socioeconomic markers, US5 shows a poverty rate of 8.2%; unemployment rate near 0.0%.
Labor and commute patterns include leading industry context around Construction, Healthcare, and Administrative support; a mean commute of about 131.0 minutes (U.S. average near 26.8).
Median home value is about $43,000 — about 88% below the U.S. median home value ($348,079).
Housing tenure and rents show owner-occupancy near 67.9% (about 2.5 points above the national owner-occupancy rate (65.4%)).
To comfortably buy a median-priced home in ZIP 78674 in Weir, TX, a household would need roughly $12,000 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 $276. That sits below the local median household income ($95,481), 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 Weir city, TX as Relatively Moderate (composite score 90.1), which is among the highest nationally. The strongest component scores on US5 are flood (91.3) and wildfire (87.8). 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 Weir city, TX show limited published climate normals on US5.
IRS migration statistics show a net inflow of about 9 for ZIP 78674 (Weir 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.