ZIP Code 85140 — San Tan Valley CDP, AZ Demographics & Data

ZIP code 85140 covers San Tan Valley, AZ in Pinal County with a population of about 51,078.

At a glance, the area shows median age of 34.7 versus a U.S. median of about 38.9.

It sits in telephone area code 480; U.S. House district AZ-2; the PHOENIX (PRESCOTT) media market.

Median household income in ZIP 85140 is about $98,668 — about 31% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 7.1%; unemployment rate near 4.3%; 29.9% of adults with a bachelor’s degree or higher (about 3.8 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Retail trade, Healthcare, and Education; about 16.7% of workers reporting work-from-home (about 1.5 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 $411,800 — about 18% above the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,573 (about 35% above the U.S. median rent ($1,163)), and owner-occupancy near 84.1% (about 18.7 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 85140 in San Tan Valley, AZ, a household would need roughly $113,000 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 $2,645. That is roughly in line with the local median household income ($98,668). 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 Tan Valley CDP, AZ as Relatively Moderate (composite score 93.8), which is among the highest nationally. The strongest component scores on US5 are wildfire (98.0) and flood (96.4). 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 Tan Valley CDP, AZ show little to no average snow.

IRS migration statistics show a net inflow of about 1,713 for ZIP 85140 (San Tan Valley CDP, AZ) 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.