Bethlehem Township, Northampton County, Pennsylvania
|Elevation||440 ft (134.1 m)|
|Area||14.7 sq mi (38.1 km2)|
|- land||14.6 sq mi (38 km2)|
|- water||0.1 sq mi (0 km2), 0.68%|
|Density||1,625.3 / sq mi (627.5 / km2)|
|- summer (DST)||EDT (UTC-4)|
|Postal code||18020, 18045|
|Area code||610, 484|
The population of Bethlehem Township was 23,730 at the 2010 census.
According to the United States Census Bureau, the township has a total area of 14.7 square miles (38 km2), of which, 14.6 square miles (38 km2) of it is land and 0.1 square miles (0.26 km2) of it (0.61%) is water. It is drained by the Lehigh River, which separates it from Lower Saucon Township. Its villages include Brodhead, Butztown, Farmersville, Middletown, Prospect Park (also in Palmer Township,) and Wagnerville. Its major roads include east-to-west Highway 22, William Penn Highway, and Freemansburg Road and north-to-south Highway 33, Route 191, Butztown Road/Hecktown Road, Farmersville Road, and Main Street Extension.
Neighboring municipalities 
- Lower Saucon Township (south)
- Easton (southeast)
- Palmer Township (east)
- Lower Nazareth Township (north)
- Hanover Township (west)
- Bethlehem (southwest)
- Freemansburg (southwest)
As of the census of 2000, there were 21,171 people, 7,619 households, and 5,889 families residing in the township. The population density was 1,451.7 people per square mile (560.6/km²). There were 7,831 housing units at an average density of 537.0/sq mi (207.4/km²). The racial makeup of the township was 93.27% White, 2.44% African American, 0.07% Native American, 2.20% Asian, 0.01% Pacific Islander, 1.14% from other races, and 0.87% from two or more races. Hispanic or Latino of any race were 3.97% of the population.
There were 7,619 households out of which 36.2% had children under the age of 18 living with them, 67.4% were married couples living together, 7.4% had a female householder with no husband present, and 22.7% were non-families. 19.2% of all households were made up of individuals and 8.9% had someone living alone who was 65 years of age or older. The average household size was 2.69 and the average family size was 3.09.
In the township the population was spread out with 25.1% under the age of 18, 6.4% from 18 to 24, 28.1% from 25 to 44, 25.5% from 45 to 64, and 14.8% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 93.1 males. For every 100 females age 18 and over, there were 89.5 males.
The median income for a household in the township was $60,317, and the median income for a family was $68,427. Males had a median income of $47,363 versus $32,136 for females. The per capita income for the township was $25,141. About 2.2% of families and 2.7% of the population were below the poverty line, including 2.6% of those under age 18 and 4.2% of those age 65 or over.
Public education 
The township is served by the Bethlehem Area School District and is also host to Northampton Community College. Notre Dame High School, Moravian Academy, and Our Lady of Perpetual Help schools make up the parochial schools.
Police personnel earned 15 of the township's top 20 salaries in 2006 with the highest-paid officer grossing nearly $78,000, according to figures released by the township in 2007.
Fire and EMS 
Bethlehem Township is served by two volunteer fire departments. The first, Nancy Run Fire Department Station 14, houses three Engines, one Truck (100 ft. Ladder-Tower), one Utility Truck, one Light and Air Truck and two command vehicles. The second Department, Bethlehem Township Fire Company Station 17, houses two engines, one rescue, one brush unit, and a multitude of special response vehicles. This station also houses the a paid ALS EMS department. Both departments average more than 800 fire calls (both departments run mutually on each call within the township) a year making them the busiest volunteer fire district in Northampton county.