ZIP Code 94528 — Diablo CDP, CA Demographics & Data

ZIP code 94528 covers Diablo, CA in Contra Costa County with a population of about 1,000.

At a glance, the area shows median age of 37.8 (near the U.S. median).

It sits in telephone area code 925; U.S. House district CA-10; the SAN FRANCISCO - OAK - SAN JOSE media market.

Diablo, CA ranks among higher-income / higher-home-value communities on US5 (very high median home values). Searchers often dig into housing affordability stretch, private schools, and neighborhood comparisons rather than entry-level rentals.

On socioeconomic markers, US5 shows a poverty rate of 10.6%; unemployment rate near 8.2%; 85.0% of adults with a bachelor’s degree or higher (about 51.3 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Construction, Arts and entertainment, and Finance and insurance; about 4.2% of workers reporting work-from-home (about 11.0 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 $2,000,001 — about 475% above the U.S. median home value ($348,079).

Housing tenure and rents show owner-occupancy near 100.0% (about 34.6 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 94528 in Diablo, CA, a household would need roughly $551,000 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 $12,847. 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 Diablo CDP, CA as Very High (composite score 99.5), which is among the highest nationally. The strongest component scores on US5 are flood (99.5) and wildfire (97.6). 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 Diablo CDP, CA show little to no average snow and around 26.1 inches of annual precipitation.

IRS migration statistics show a net inflow of about 49 for ZIP 94528 (Diablo CDP, CA) 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.