🇺🇸 United States ZIP Code

STANDARD

48309

Rochester

ZIP Code 48309 is a standard zip code serving Rochester, Rochester, Michigan (MI), in Oakland County, United States. It has an estimated population of 29,135 with a median household income of $84,118. The area falls within the America/Detroit timezone.

Median Household Income vs. National Average

Location

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

Coordinates

Latitude: 42.662600
Longitude: -83.183700

Geographic Details

Land Area: 15.46 mi²
Water Area: 0.02 mi²
Population Density: 1885.0 people per mi² (80th percentile)
Bounding Box: 42.695249°N, 42.620995°S, -83.150492°E, -83.220994°W

With 29,135 residents spread across 15.46 square miles, this area has a population density of 1885.0 people per square mile.

Demographics

29,135

Population

85th percentile

$84,118

Median Income

90th percentile

$217,500

Median Home Value

75th percentile

15.46 mi²

Land Area

The median household income in 48309 is $84,118, and the median home value is $217,500. This places the area in the top 25% nationally for household income.

Housing

11,386

Total Units

10,793

Occupied Units

94.8%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Rochester, MI.

48306

Rochester

48307

Rochester

48308

Rochester

Similar ZIP Codes in Michigan

ZIP codes with similar median household income in Michigan.

48187

Canton

$76,430

48116

Brighton

$73,793

48084

Troy

$84,331

48380

Milford

$89,167

48044

Macomb

$83,313

48370

Oxford

$94,028

48138

Grosse Ile

$88,238

49316

Caledonia

$80,434

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.