| Official Name: | Williamstown, Pennsylvania |
| Mapsize: | 260px |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Label: | Williamstown |
| Pushpin Map Caption: | Location in Pennsylvania and the United States |
| Pushpin Label Position: | left |
| Settlement Type: | Borough |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Dauphin |
| Government Type: | Borough Council |
| Leader Title: | Mayor |
| Established Title: | Settled |
| Established Date: | 1869 |
| Established Title1: | Incorporated |
| Established Date1: | 1877 |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.67 |
| Area Land Km2: | 0.67 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.26 |
| Area Land Sq Mi: | 0.26 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 1303 |
| Population Density Km2: | 1940.88 |
| Population Density Sq Mi: | 5030.89 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.5811°N -76.6183°W |
| Elevation M: | 264 |
| Elevation Ft: | 866 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 17098 |
| Area Code: | 717 |
| Blank Name: | FIPS code |
| Blank Info: | 42-85320 |
Williamstown is a borough in Dauphin County, Pennsylvania, United States. The borough is northeast of Harrisburg. Formerly, anthracite coal mines and hosiery mills were located in the borough. The population was 1,303 at the 2020 census.[3]
Williamstown is part of the Harrisburg–Carlisle Metropolitan Statistical Area.
Williamstown is located in northeastern Dauphin County at 40.5811°N -76.6183°W (40.581075, -76.618296).[4] It is in the valley of Wiconisco Creek, between Big Lick Mountain to the north and Berry Mountain to the south. U.S. Route 209 passes to the south of the borough, leading northeast to Pottsville and west to Elizabethville.
According to the United States Census Bureau, the borough has a total area of 0.67km2, all land.[5]
As of the census[6] of 2000, there were 1,433 people, 611 households, and 406 families residing in the borough. The population density was 5692.2sp=usNaNsp=us. There were 716 housing units at an average density of 2844.1sp=usNaNsp=us. The racial makeup of the borough was 99.02% White, 0.14% African American, 0.07% Native American, 0.21% Asian, 0.07% from other races, and 0.49% from two or more races. Hispanic or Latino of any race were 0.35% of the population.
There were 611 households, 25.7% of which included children under the age of 18. 49.3% were married couples living together, 11.6% had a female householder, and 33.4% were non-families. 29.0% of all households consisted of individuals, and 15.9% were single residents 65 years of age or older. The average household size was 2.35 and the average family size was 2.83.
The borough population included 21.8% under the age of 18; 8.0% from 18 to 24; 27.5% from 25 to 44; 22.0% from 45 to 64; and 20.7% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 90.1 males. For every 100 females age 18 and over, there were 86.5 males.
The median income for a household in the borough was $33,359, and the median income for a family was $36,548. Males had a median income of $31,855 versus $23,125 for females. The per capita income for the borough was $15,744. About 11.9% of families and 14.7% of the population were below the poverty line, including 18.6% of those under age 18 and 10.8% of those age 65 or over.