🇺🇸 United States ZIP Code

STANDARD

17551

Millersville

ZIP Code 17551 is a standard zip code serving Millersville, Millersville, Pennsylvania (PA), in Lancaster County, United States. It has an estimated population of 10,857 with a median household income of $51,582. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

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

Coordinates

Latitude: 39.998200
Longitude: -76.356600

Geographic Details

Land Area: 10.09 mi²
Water Area: 0.21 mi²
Population Density: 1076.0 people per mi² (75th percentile)
Bounding Box: 40.022996°N, 39.939077°S, -76.339259°E, -76.418125°W

With 10,857 residents spread across 10.09 square miles, this area has a population density of 1076.0 people per square mile.

Demographics

10,857

Population

70th percentile

$51,582

Median Income

55th percentile

$186,400

Median Home Value

70th percentile

10.09 mi²

Land Area

The median household income in 17551 is $51,582, and the median home value is $186,400.

Housing

3,622

Total Units

3,469

Occupied Units

95.8%

Occupancy Rate

Similar ZIP Codes in Pennsylvania

ZIP codes with similar median household income in Pennsylvania.

16433

Saegertown

$45,977

16050

Petrolia

$51,053

17345

Manchester

$55,438

16360

Townville

$46,488

17048

Lykens

$46,762

17834

Kulpmont

$45,772

18660

Wapwallopen

$53,125

18643

Pittston

$50,817

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.