🇺🇸 United States ZIP Code

STANDARD

48118

Chelsea

ZIP Code 48118 is a standard zip code serving Chelsea, Chelsea, Michigan (MI), in Washtenaw County, United States. It has an estimated population of 12,552 with a median household income of $68,134. The area falls within the America/Detroit timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Michigan (MI)
County: Washtenaw
City: Chelsea
Timezone: America/Detroit

Coordinates

Latitude: 42.320700
Longitude: -84.033400

Geographic Details

Land Area: 87.74 mi²
Water Area: 4.17 mi²
Population Density: 143.0 people per mi² (55th percentile)
Bounding Box: 42.411014°N, 42.216282°S, -83.916572°E, -84.131604°W

With 12,552 residents spread across 87.74 square miles, this area has a population density of 143.0 people per square mile.

Demographics

12,552

Population

70th percentile

$68,134

Median Income

80th percentile

$205,800

Median Home Value

75th percentile

87.74 mi²

Land Area

The median household income in 48118 is $68,134, and the median home value is $205,800. This places the area in the top 25% nationally for household income.

Housing

5,465

Total Units

5,003

Occupied Units

91.5%

Occupancy Rate

Similar ZIP Codes in Michigan

ZIP codes with similar median household income in Michigan.

48359

Lake Orion

$58,150

48623

Freeland

$67,509

48096

Ray

$76,102

48072

Berkley

$70,023

48346

Clarkston

$61,315

48150

Livonia

$63,576

48164

New Boston

$75,034

48894

Westphalia

$64,808

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.