🇺🇸 United States ZIP Code

STANDARD

27857

Oak City

ZIP Code 27857 is a standard zip code serving Oak City, Oak City, North Carolina (NC), in Martin County, United States. It has an estimated population of 1,298 with a median household income of $24,453. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: North Carolina (NC)
County: Martin
City: Oak City
Timezone: America/New_York

Coordinates

Latitude: 35.959700
Longitude: -77.300400

Geographic Details

Land Area: 63.17 mi²
Water Area: 0.05 mi²
Population Density: 21.0 people per mi² (20th percentile)
Bounding Box: 36.074937°N, 35.896441°S, -77.134429°E, -77.397216°W

With 1,298 residents spread across 63.17 square miles, this area has a population density of 21.0 people per square mile.

Demographics

1,298

Population

30th percentile

$24,453

Median Income

$70,300

Median Home Value

10th percentile

63.17 mi²

Land Area

The median household income in 27857 is $24,453, and the median home value is $70,300.

Housing

699

Total Units

574

Occupied Units

82.1%

Occupancy Rate

Similar ZIP Codes in North Carolina

ZIP codes with similar median household income in North Carolina.

28091

Lilesville

$28,520

28719

Cherokee

$26,565

27101

Winston-Salem

$24,350

28743

Hot Springs

$24,159

28206

Charlotte

$21,087

27209

Biscoe

$27,986

27986

Winton

$28,143

27818

Como

$26,250

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.