| Official Name: | Upper Allen Township, Pennsylvania |
| Settlement Type: | Township |
| Mapsize: | 250x200px |
| Image Map1: | Map of Pennsylvania highlighting Cumberland County.svg |
| Mapsize1: | 250x200px |
| Map Caption1: | Map of Cumberland County, Pennsylvania |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Cumberland |
| Government Type: | Board of Commissioners |
| Leader Title: | President |
| Leader Name: | Kenneth Martin (R) |
| Leader Title1: | Vice President |
| Leader Name1: | Richard Castranio, Jr. (R) |
| Leader Title2: | Commissioner |
| Leader Name2: | Virginia Anderson (R) |
| Established Title: | Settled |
| Established Title1: | Incorporated |
| Established Date1: | 1850 |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 34.45 |
| Area Land Km2: | 34.18 |
| Area Water Km2: | 0.27 |
| Area Total Sq Mi: | 13.30 |
| Area Land Sq Mi: | 13.20 |
| Area Water Sq Mi: | 0.10 |
| Population As Of: | 2020 |
| Population Total: | 23,183 |
| Population Density Km2: | 579.79 |
| Population Density Sq Mi: | 1501.59 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Area Code: | 717 |
| Pop Est As Of: | 2020 (est.) |
| Population Est: | 23197 |
| Blank Name: | FIPS code |
| Blank Info: | 42-041-78736 |
| Leader Title3: | Commissioner |
| Leader Name3: | Eric Fairchild (D) |
| Leader Title4: | Commissioner |
| Leader Name4: | Phil Walsh (D) |
Upper Allen Township is a township in Cumberland County, Pennsylvania, United States. The population was 23,183 at the 2020 census,[2] up from 18,059 at the 2010 census.
The township is in eastern Cumberland County, bordered by the borough of Mechanicsburg to the north and York County to the south. Interstate 76, the Pennsylvania Turnpike, crosses the northern part of the township from east to west, while the U.S. Route 15 freeway crosses the township from northeast to southwest. Three highway interchanges provide access from US 15 to the township, while a fourth connects to Exit 236 on the Pennsylvania Turnpike. From the US 15/I-76 interchange it is 8miles northeast to Harrisburg, the state capital, and southwest to Gettysburg, both via US 15, while it is east to Philadelphia and west to Pittsburgh via the Turnpike.
According to the United States Census Bureau, the township has a total area of 34.4sqkm, of which 34.2sqkm is land and 0.3sqkm, or 0.78%, is water.[2] Yellow Breeches Creek forms the southern border of the township, separating it from York County.
Several unincorporated communities are in the township, including Grantham, Bowmansdale, Shepherdstown, Nantilly, Mt. Allen, Winding Hill, and Winding Heights. The campus of Messiah University is defined as a census-designated place for population statistics.
As of the census[3] of 2020, there were 23,183 people and 7,893 households residing in the township. The population density was 1750.1sp=usNaNsp=us. The racial makeup of the township was 86% White, 6.3% African American, 0.2% Native American, 4.0% Asian, 2.4% from two or more races. Hispanic or Latino of any race were 1.9% of the population.
There were 7,893 households, out of which 19.5% had children under the age of 18 living with them, 61.5% were married couples living together, 7.5% had a female householder with no husband present, and 28.8% were non-families. 24.3% of all households were made up of individuals, and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.95.
In the township the population was spread out, with 19.8% under the age of 18, 19.2% from 18 to 24, 23.3% from 25 to 44, 22.3% from 45 to 64, and 15.5% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 83.7 males. For every 100 females age 18 and over, there were 79.4 males.
The median income for a household in the township was $86,817, and the median income for a family was $65,349. Males had a median income of $45,589 versus $30,103 for females. The per capita income for the township was $45,486. About 2.9% of families and 4.2% of the population were below the poverty line, including 5.8% of those under age 18 and 4.1% of those age 65 or over.
Upper Allen Township residents are served by the Mechanicsburg Area School District. Additionally, the township is home to Messiah University.