🇺🇸 United States ZIP Code

STANDARD

48039

Marine City

ZIP Code 48039 is a standard zip code serving Marine City, Marine City, Michigan (MI), in St. Clair County, United States. It has an estimated population of 7,807 with a median household income of $46,190. The area falls within the America/Detroit timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Michigan (MI)
County: St. Clair
City: Marine City
Timezone: America/Detroit

Coordinates

Latitude: 42.685900
Longitude: -82.549900

Geographic Details

Land Area: 23.01 mi²
Water Area: 1.87 mi²
Population Density: 339.0 people per mi² (65th percentile)
Bounding Box: 42.728547°N, 42.653225°S, -82.483623°E, -82.610600°W

With 7,807 residents spread across 23.01 square miles, this area has a population density of 339.0 people per square mile.

Demographics

7,807

Population

65th percentile

$46,190

Median Income

45th percentile

$106,600

Median Home Value

35th percentile

23.01 mi²

Land Area

The median household income in 48039 is $46,190, and the median home value is $106,600.

Housing

3,541

Total Units

3,154

Occupied Units

89.1%

Occupancy Rate

Similar ZIP Codes in Michigan

ZIP codes with similar median household income in Michigan.

49318

Casnovia

$49,375

48417

Burt

$46,382

49448

Nunica

$45,909

48757

Reese

$52,386

48763

Tawas City

$42,319

48831

Elsie

$46,779

49310

Blanchard

$40,550

49729

Ellsworth

$44,934

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.