🇺🇸 United States ZIP Code

STANDARD

17020

Duncannon

ZIP Code 17020 is a standard zip code serving Duncannon, Duncannon, Pennsylvania (PA), in Perry County, United States. It has an estimated population of 9,047 with a median household income of $63,655. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Pennsylvania (PA)
County: Perry
City: Duncannon
Timezone: America/New_York

Coordinates

Latitude: 40.408700
Longitude: -77.047300

Geographic Details

Land Area: 57.52 mi²
Water Area: 1.03 mi²
Population Density: 157.0 people per mi² (60th percentile)
Bounding Box: 40.490572°N, 40.339430°S, -76.933589°E, -77.131572°W

With 9,047 residents spread across 57.52 square miles, this area has a population density of 157.0 people per square mile.

Demographics

9,047

Population

65th percentile

$63,655

Median Income

75th percentile

$157,000

Median Home Value

60th percentile

57.52 mi²

Land Area

The median household income in 17020 is $63,655, and the median home value is $157,000. This places the area in the top 25% nationally for household income.

Housing

3,836

Total Units

3,539

Occupied Units

92.3%

Occupancy Rate

Similar ZIP Codes in Pennsylvania

ZIP codes with similar median household income in Pennsylvania.

17554

Mountville

$58,125

18328

Dingmans Ferry

$58,110

19506

Bernville

$65,797

17003

Annville

$57,550

17938

Hegins

$58,409

17073

Newmanstown

$59,235

17520

East Petersburg

$68,587

16648

Hollidaysburg

$56,187

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.