Williams Township is a township in Northampton County, Pennsylvania. Williams Township is located in the Lehigh Valley region of the state.
The population of Williams Township was 4,470 at the 2000 census.
As of the census2 of 2000, there were 4,470 people, 1,657 households, and 1,267 families residing in the township. The population density was 93.8/km² (243.0/mi²). There were 1,738 housing units at an average density of 36.5/km² (94.5/mi²). The racial makeup of the township was 97.25% White, 0.81% African American, 0.04% Native American, 0.94% Asian, 0.02% Pacific Islander, 0.13% from other races, and 0.81% from two or more races. Hispanic or Latino of any race were 1.05% of the population.
There were 1,657 households out of which 31.1% had children under the age of 18 living with them, 66.6% were married couples living together, 6.0% had a female householder with no husband present, and 23.5% were non-families. 18.4% of all households were made up of individuals and 7.0% had someone living alone who was 65 years of age or older. The average household size was 2.70 and the average family size was 3.10.
In the township the population was spread out with 24.2% under the age of 18, 5.9% from 18 to 24, 28.1% from 25 to 44, 28.8% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 99.4 males. For every 100 females age 18 and over, there were 98.5 males.
The median income for a household in the township was $56,196, and the median income for a family was $66,488. Males had a median income of $44,545 versus $29,358 for females. The per capita income for the township was $27,249. About 1.7% of families and 2.7% of the population were below the poverty line, including 1.4% of those under age 18 and 2.2% of those age 65 or over.
The Township is served by the Wilson Area School District.