Williamstown, PA Profile: Facts, Map & Data


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Williamstown, Pennsylvania - Basic Facts

The Borough of Williamstown had a population of 1,361 as of July 1, 2017. Williamstown ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Pennsylvania. See peer rankings below.

The primary coordinate point for Williamstown is located at latitude 40.5809 and longitude -76.617 in Dauphin County. The formal boundaries for the Borough of Williamstown (see map below) encompass a land area of 0.26 sq. miles and a water area of 0 sq. miles. Dauphin County is in the Eastern time zone (GMT -5). The elevation is 732 feet.

The Borough of Williamstown (GNIS ID: 1215172) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Beneath the boundary map are tables with Williamstown population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Borough of Williamstown, PA Boundary Map

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Williamstown, PA Data & Demographics (As of July 1, 2017)


Total Population 1,361
Daytime Population: Workers 251
Daytime Population: Residents 713
Total Daytime Population (TDP) 964
Ratio TDP/Total Population1 0.71
Population in Households 1,361
Population in Familes 1,073
Population in Group Qrtrs 0
Population Density2 5,251
Diversity Index3 12


Median Household Income $48,286
Average Household Income $56,164
Per Capita Income $23,401


Total Housing Units 679 (100%)
Owner Occupied HU 403 (59.4%)
Renter Occupied HU 154 (22.7%)
Vacant Housing Units 123 (18.1%)
Median Home Value $81,818
Average Home Value $94,776


Total Households 556
Average Household Size 2.45
Family Households 359
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population -0.26% -0.06%
Households -0.27% -0.07%
Families -0.27% -0.17%
Median Household Income   2.11%
Per Capita Income   3.13%

Williamstown, PA - Peer Comparisons by Rank and Percentile

The table below compares Williamstown to the other 1,762 incorporated cities, towns and CDPs in Pennsylvania by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 821 54th
Population Density # 123 93rd
Diversity Index # 916 48th
Median Household Income # 1044 41st
Per Capita Income # 1263 28th

Additional comparisons and rankings can be made with a VERY EASY TO USE Pennsylvania Census Data Comparison Tool.

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