🇺🇸 United States ZIP Code

STANDARD

73533

Duncan

ZIP Code 73533 is a standard zip code serving Duncan, Duncan, Oklahoma (OK), in Stephens County, United States. It has an estimated population of 28,434 with a median household income of $42,602. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Oklahoma (OK)
County: Stephens
City: Duncan
Timezone: America/Chicago

Coordinates

Latitude: 34.507300
Longitude: -97.940300

Geographic Details

Land Area: 331.90 mi²
Water Area: 4.77 mi²
Population Density: 86.0 people per mi² (50th percentile)
Bounding Box: 34.615655°N, 34.376205°S, -97.562297°E, -98.185967°W

With 28,434 residents spread across 331.90 square miles, this area has a population density of 86.0 people per square mile.

Demographics

28,434

Population

85th percentile

$42,602

Median Income

35th percentile

$98,700

Median Home Value

30th percentile

331.90 mi²

Land Area

The median household income in 73533 is $42,602, and the median home value is $98,700.

Housing

13,111

Total Units

11,574

Occupied Units

88.3%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Duncan, OK.

73534

Duncan

73536

Duncan

Similar ZIP Codes in Oklahoma

ZIP codes with similar median household income in Oklahoma.

73728

Cherokee

$42,813

73062

Mountain View

$40,391

73448

Marietta

$42,138

73059

Minco

$47,981

73104

Oklahoma City

$40,956

74038

Jennings

$45,920

73738

Garber

$41,964

74959

Spiro

$36,976

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.