| Official Name: | Washington Township, Northumberland County, Pennsylvania |
| Settlement Type: | Township |
| Mapsize: | 250x200px |
| Image Map1: | Map of Pennsylvania highlighting Northumberland County.svg |
| Mapsize1: | 250x200px |
| Map Caption1: | Map of Northumberland County, Pennsylvania |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Northumberland |
| Government Type: | Board of Supervisors |
| Established Title: | Settled |
| Established Date: | 1774 |
| Established Title1: | Incorporated |
| Established Date1: | 1856 |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 46.89 |
| Area Land Km2: | 46.86 |
| Area Water Km2: | 0.03 |
| Area Total Sq Mi: | 18.10 |
| Area Land Sq Mi: | 18.09 |
| Area Water Sq Mi: | 0.01 |
| Population As Of: | 2010 |
| Population Total: | 746 |
| Population Density Km2: | 15.84 |
| Population Density Sq Mi: | 41.01 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Area Code: | 570 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [2] |
| Population Est: | 742 |
| Blank Name: | FIPS code |
| Blank Info: | 42-097-81304 |
Washington Township is a township that is located in Northumberland County, Pennsylvania, United States. The population at the time of the 2010 Census was 746,[3] an increase over the figure of 660 that was tabulated in 2000.
Himmel's Church Covered Bridge is located within the township.
The Himmel's Church Covered Bridge was listed on the National Register of Historic Places in 1979.
According to the United States Census Bureau, the township has a total area of 18.1 square miles (46.9 km2), all land.
As of the census[4] of 2000, there were 660 people, 263 households, and 199 families residing in the township.
The population density was 36.4sp=usNaNsp=us. There were 283 housing units at an average density of 15.6/sq mi (6.0/km2).
The racial makeup of the township was 99.70% White, 0.15% from other races, and 0.15% from two or more races. Hispanic or Latino of any race were 0.15% of the population.
There were 263 households, out of which 30.4% had children who were under the age of eighteen living with them; 65.4% were married couples living together, 6.8% had a female householder with no husband present, and 24.3% were non-families. Of all of the households that were documented, 21.3% were made up of individuals, and 14.8% had someone living alone who was sixty-five years of age or older.
The average household size was 2.51 and the average family size was 2.94.
Within the township, the population was spread out, with 23.3% of residents who were under the age of eighteen, 6.1% who were aged eighteen to twenty-four, 26.7% who were aged twenty-five to forty-four, 27.6% who were aged forty-five to sixty-four, and 16.4% who were sixty-five years of age or older. The median age was forty-two years.
For every one hundred females, there were 103.7 males. For every one hundred females who were aged eighteen or older, there were 96.9 males.
The median income for a household in the township was $39,000, and the median income for a family was $49,625. Males had a median income of $33,036 compared with that of $21,023 for females.
The per capita income for the township was $17,675.
Approximately 5.6% of families and 7.9% of the population were living below the poverty line, including 13.8% of those who were under the age of eighteen and 11.1% of those who were aged sixty-five or older.