🇺🇸 United States ZIP Code

STANDARD

85140

San Tan Valley

ZIP Code 85140 is a standard zip code serving San Tan Valley, San Tan Valley, Arizona (AZ), in Pinal County, United States. It has an estimated population of 36,711 with a median household income of $54,616. The area falls within the America/Phoenix timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Arizona (AZ)
County: Pinal
City: San Tan Valley
Timezone: America/Phoenix

Coordinates

Latitude: 33.191100
Longitude: -111.528000

Geographic Details

Land Area: 33.54 mi²
Population Density: 1095.0 people per mi² (75th percentile)
Bounding Box: 33.336641°N, 33.175340°S, -111.487750°E, -111.583824°W

With 36,711 residents spread across 33.54 square miles, this area has a population density of 1095.0 people per square mile.

Demographics

36,711

Population

90th percentile

$54,616

Median Income

65th percentile

$127,600

Median Home Value

50th percentile

33.54 mi²

Land Area

The median household income in 85140 is $54,616, and the median home value is $127,600.

Housing

12,775

Total Units

11,068

Occupied Units

86.6%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in San Tan Valley, AZ.

85143

San Tan Valley

85144

San Tan Valley

Similar ZIP Codes in Arizona

ZIP codes with similar median household income in Arizona.

85012

Phoenix

$49,226

85741

Tucson

$51,871

86325

Cornville

$47,932

85037

Phoenix

$47,695

85137

Kearny

$47,569

86032

Joseph City

$47,750

85361

Wittmann

$47,738

85614

Green Valley

$47,329

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.