[5] As of the 2000 census,[6] there were 3,517 people, 1,337 households, and 989 families residing in the township.

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.

Nockamixon township is patrolled by the Pennsylvania State Police, Dublin Barracks.

According to the Köppen climate classification system, Nockamixon Township, Pennsylvania has a hot-summer, wet all year, humid continental climate (Dfa).

On average, the wettest month of the year is July which corresponds with the annual peak in thunderstorm activity.

The plant hardiness zone is 6b with an average annual extreme minimum air temperature of −2.9 °F (−19.4 °C).

[7] The average seasonal (Nov-Apr) snowfall total is between 30 and 36 inches (76 and 91 centimetres), and the average snowiest month is February which corresponds with the annual peak in nor'easter activity.

PA 611 utilizes Easton Road on a north–south alignment through the heart of the township.