🇺🇸 United States ZIP Code

PO BOX

73556

Martha

ZIP Code 73556 is a po box zip code serving Martha, Martha, Oklahoma (OK), in Jackson County, United States. It has an estimated population of 166 with a median household income of $44,531. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

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

Coordinates

Latitude: 34.725300
Longitude: -99.387000

Geographic Details

Land Area: 1.44 mi²
Population Density: 115.0 people per mi² (55th percentile)
Bounding Box: 34.747145°N, 34.714898°S, -99.373822°E, -99.395824°W

With 166 residents spread across 1.44 square miles, this area has a population density of 115.0 people per square mile.

Demographics

166

Population

$44,531

Median Income

40th percentile

$56,200

Median Home Value

5th percentile

1.44 mi²

Land Area

The median household income in 73556 is $44,531, and the median home value is $56,200.

Housing

Total Units

Occupied Units

73.3%

Occupancy Rate

Similar ZIP Codes in Oklahoma

ZIP codes with similar median household income in Oklahoma.

74653

Tonkawa

$42,819

73547

Granite

$39,750

73546

Grandfield

$38,507

74022

Copan

$50,060

73737

Fairview

$48,801

74083

Wann

$41,700

73852

Mooreland

$45,357

74878

Wanette

$38,125

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.