🇺🇸 United States ZIP Code

STANDARD

17821

Danville

ZIP Code 17821 is a standard zip code serving Danville, Danville, Pennsylvania (PA), in Montour County, United States. It has an estimated population of 18,219 with a median household income of $53,067. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

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

Coordinates

Latitude: 40.979900
Longitude: -76.622900

Geographic Details

Land Area: 133.55 mi²
Water Area: 2.91 mi²
Population Density: 136.0 people per mi² (55th percentile)
Bounding Box: 41.144597°N, 40.865040°S, -76.506431°E, -76.794246°W

With 18,219 residents spread across 133.55 square miles, this area has a population density of 136.0 people per square mile.

Demographics

18,219

Population

80th percentile

$53,067

Median Income

60th percentile

$157,900

Median Home Value

60th percentile

133.55 mi²

Land Area

The median household income in 17821 is $53,067, and the median home value is $157,900.

Housing

8,053

Total Units

7,480

Occupied Units

92.9%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Danville, PA.

17822

Danville

Similar ZIP Codes in Pennsylvania

ZIP codes with similar median household income in Pennsylvania.

16025

Chicora

$58,679

15823

Brockport

$46,523

16686

Tyrone

$46,492

18428

Hawley

$55,092

15338

Greensboro

$45,905

17222

Fayetteville

$48,693

18052

Whitehall

$55,861

16935

Middlebury Center

$53,125

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.