In 2010, the population was 6,414 people. living in 2,200 households. The average household income was $62,000. As of the census of 2000, there were 5,730 people, 1,823 households, and 1,421 families residing in the township. The population density was 366.4 people per square mile. There were 1,894 housing units at an average density of 121.1/sq mi. The racial makeup of the township was 95.97% White, 1.20% African American, 0.03% Native American, 1.78% Asian, 0.07% Pacific Islander, 0.35% from other races, and 0.59% from two or more races. Hispanic or Latino of any race were 1.87% of the population. There were 1,823 households, out of which 33.6% had children under the age of 18 living with them, 71.5% were married couplesliving together, 5.4% had a female householder with no husband present, and 22.0% were non-families. 18.7% of all households were made up of individuals, and 8.3% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 2.95. In the township the population was spread out, with 20.8% under the age of 18, 16.0% from 18 to 24, 19.8% from 25 to 44, 25.2% from 45 to 64, and 18.2% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 94.2 males. For every 100 females age 18 and over, there were 94.0 males. The median income for a household in the township was $62,158, and the median income for a family was $68,672. Males had a median income of $53,654 versus $30,833 for females. The per capita income for the township was $26,459. About 0.9% of families and 1.8% of the population were below the poverty line, including none of those under age 18 and 0.9% of those age 65 or over.
Government
There are four polling places in the township. East Buffalo Township 1 is located in Outlook Pointe at Lewisburg, 2421 Old Turnpike Rd., Lewisburg. East Buffalo Township 2 is located in the Union County Public Library, 255 Reitz Blvd, Lewisburg. East Buffalo Township 3 is located in the Donald H. Eichhorn Middle School, 2057 Washington Ave, Lewisburg. East Buffalo Township 4 is located in the Weis Center, Bucknell University, 525 Weis Dr., Lewisburg. In December 2015, the Township supervisors adopted a $4.08 million budget which required a tax increase to 4.96 mills.