According to the United States Census Bureau, the township has a total area of 22.6 square miles, of which, 22.2 square miles of it is land and 0.4 square miles of it is water. It is drained by the Delaware River, which separates it from New Jersey. Its villages include Bucksville, Fehrtown, Ferndale, Frogtown, Harrow, Kintnersville, and Revere. Natural features include Beaver Creek, Cauffman Hill, Gallows Hill, Gallows Run, Haycock Creek, Lake Warren, Narrows Creek, The Narrows, and Tinicum Creek.
Neighboring municipalities
Durham Township
Springfield Township
Haycock Township
Bedminster Township
Tinicum Township
Bridgeton Township
Holland Township, New Jersey
Climate
According to the Köppen climate classification system, Nockamixon Township, Pennsylvania has a hot-summer, wet all year, humid continental climate. Dfa climates are characterized by at least one month having an average mean temperature ≤ 32.0 °F, at least four months with an average mean temperature ≥ 50.0 °F, at least one month with an average mean temperature ≥ 71.6 °F, and no significant precipitation difference between seasons. During the summer months, episodes of extreme heat and humidity can occur with heat index values ≥ 100 °F. On average, the wettest month of the year is July which corresponds with the annual peak in thunderstorm activity. During the winter months, episodes of extreme cold and wind can occur with wind chill values < 0 °F. The plant hardiness zone is 6b with an average annual extreme minimum air temperature of -2.9 °F. The average seasonal snowfall total is between 30 and 36 inches, and the average snowiest month is February which corresponds with the annual peak in nor'easter activity.
As of the 2010 census, the township was 96.2% White, 0.3% Black or African American, 0.1% Native American, 0.3% Asian, and 1.4% were two or more races. 1.7% of the population were of Hispanic or Latino ancestry. As of the census of 2000, there were 3,517 people, 1,337 households, and 989 families residing in the township. The population density was 158.5 people per square mile. There were 1,411 housing units at an average density of 63.6/sq mi. The racial makeup of the township was 98.29% White, 0.51% African American, 0.03% Native American, 0.11% Asian, 0.11% Pacific Islander, 0.14% from other races, and 0.80% from two or more races. Hispanic or Latino of any race were 0.60% of the population. There were 1,337 households, out of which 31.1% had children under the age of 18 living with them, 62.5% were married couplesliving together, 7.4% had a female householder with no husband present, and 26.0% were non-families. 18.8% of all households were made up of individuals, and 5.5% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the average family size was 3.04. In the township the population was spread out, with 23.5% under the age of 18, 7.3% from 18 to 24, 29.7% from 25 to 44, 29.9% from 45 to 64, and 9.6% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 105.8 males. For every 100 females age 18 and over, there were 105.2 males. The median income for a household in the township was $60,231, and the median income for a family was $66,250. Males had a median income of $45,511 versus $32,446 for females. The per capita income for the township was $26,145. About 1.0% of families and 4.0% of the population were below the poverty line, including 5.0% of those under age 18 and 7.5% of those age 65 or over. Nockamixon township is patrolled by the Pennsylvania State Police, Dublin Barracks.
