🇺🇸 United States ZIP Code

STANDARD

85128

Coolidge

ZIP Code 85128 is a standard zip code serving Coolidge, Coolidge, Arizona (AZ), in Pinal County, United States. It has an estimated population of 14,823 with a median household income of $42,035. 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: Coolidge
Timezone: America/Phoenix

Coordinates

Latitude: 32.957400
Longitude: -111.534400

Geographic Details

Land Area: 163.36 mi²
Water Area: 1.73 mi²
Population Density: 91.0 people per mi² (50th percentile)
Bounding Box: 33.121847°N, 32.835541°S, -111.397366°E, -111.687080°W

With 14,823 residents spread across 163.36 square miles, this area has a population density of 91.0 people per square mile.

Demographics

14,823

Population

75th percentile

$42,035

Median Income

30th percentile

$80,900

Median Home Value

20th percentile

163.36 mi²

Land Area

The median household income in 85128 is $42,035, and the median home value is $80,900.

Housing

5,850

Total Units

4,860

Occupied Units

83.1%

Occupancy Rate

Similar ZIP Codes in Arizona

ZIP codes with similar median household income in Arizona.

86426

Fort Mohave

$42,562

85013

Phoenix

$43,576

85194

Casa Grande

$46,250

85123

Arizona City

$43,996

86334

Paulden

$41,402

85346

Quartzsite

$39,364

86314

Prescott Valley

$39,857

86329

Humboldt

$45,053

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.