🇺🇸 United States ZIP Code

STANDARD

48421

Columbiaville

ZIP Code 48421 is a standard zip code serving Columbiaville, Columbiaville, Michigan (MI), in Lapeer County, United States. It has an estimated population of 6,647 with a median household income of $58,008. The area falls within the America/Detroit timezone.

Median Household Income vs. National Average

Location

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

Coordinates

Latitude: 43.150300
Longitude: -83.381100

Geographic Details

Land Area: 40.57 mi²
Water Area: 3.19 mi²
Population Density: 164.0 people per mi² (60th percentile)
Bounding Box: 43.203257°N, 43.089747°S, -83.287899°E, -83.479400°W

With 6,647 residents spread across 40.57 square miles, this area has a population density of 164.0 people per square mile.

Demographics

6,647

Population

60th percentile

$58,008

Median Income

70th percentile

$121,100

Median Home Value

45th percentile

40.57 mi²

Land Area

The median household income in 48421 is $58,008, and the median home value is $121,100.

Housing

2,910

Total Units

2,513

Occupied Units

86.4%

Occupancy Rate

Similar ZIP Codes in Michigan

ZIP codes with similar median household income in Michigan.

48509

Burton

$53,089

49011

Athens

$52,610

48050

New Haven

$53,375

48313

Sterling Heights

$59,036

49068

Marshall

$52,311

48813

Charlotte

$52,889

48640

Midland

$54,446

48861

Mulliken

$50,625

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.