🇺🇸 United States ZIP Code

STANDARD

21636

Goldsboro

ZIP Code 21636 is a standard zip code serving Goldsboro, Goldsboro, Maryland (MD), in Caroline County, United States. It has an estimated population of 1,186 with a median household income of $60,926. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Maryland (MD)
County: Caroline
City: Goldsboro
Timezone: America/New_York

Coordinates

Latitude: 39.023000
Longitude: -75.792600

Geographic Details

Land Area: 22.08 mi²
Water Area: 0.06 mi²
Population Density: 54.0 people per mi² (40th percentile)
Bounding Box: 39.058605°N, 38.987030°S, -75.735773°E, -75.875801°W

With 1,186 residents spread across 22.08 square miles, this area has a population density of 54.0 people per square mile.

Demographics

1,186

Population

30th percentile

$60,926

Median Income

75th percentile

$195,300

Median Home Value

70th percentile

22.08 mi²

Land Area

The median household income in 21636 is $60,926, and the median home value is $195,300. This places the area in the top 25% nationally for household income.

Housing

486

Total Units

438

Occupied Units

90.1%

Occupancy Rate

Similar ZIP Codes in Maryland

ZIP codes with similar median household income in Maryland.

21061

Glen Burnie

$60,430

20770

Greenbelt

$59,857

20714

North Beach

$68,171

21663

Saint Michaels

$67,277

21078

Havre De Grace

$65,344

20743

Capitol Heights

$57,973

21212

Baltimore

$61,912

21722

Clear Spring

$57,014

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.