ZIP Code 63304 — Weldon Spring city, MO Demographics & Data

ZIP code 63304 covers Weldon Spring, MO in St. Charles County with a population of about 43,389.

At a glance, the area shows median age of 41.3 versus a U.S. median of about 38.9.

It sits in telephone area code 636; U.S. House district MO-2; the ST. LOUIS media market.

Median household income in ZIP 63304 is about $114,124 — about 52% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 4.0%; unemployment rate near 3.8%; 48.0% of adults with a bachelor’s degree or higher (about 14.3 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Healthcare, Manufacturing, and Retail trade; about 17.4% of workers reporting work-from-home (about 2.2 points above 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 $331,300 — about 5% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,390 (about 20% above the U.S. median rent ($1,163)), and owner-occupancy near 88.4% (about 23.0 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 63304 in Weldon Spring, MO, a household would need roughly $91,000 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 $2,128. That sits below the local median household income ($114,124), 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 Weldon Spring city, MO as Relatively Moderate (composite score 92.6), which is among the highest nationally. The strongest component scores on US5 are flood (94.2) and wildfire (58.8). 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 Weldon Spring city, MO show little to no average snow and around 44.4 inches of annual precipitation.

IRS migration statistics show a net inflow of about 1,961 for ZIP 63304 (Weldon Spring city, MO) 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.