Shrewsbury Township was formed from part of Muncy Township in 1804. It was originally much larger in size and included a large part of what is now Sullivan County until 1847. It is named for Shrewsbury Township, New Jersey. Some of the first settlers, The Little and Bennett families, migrated to Lycoming County from New Jersey and wanted their new home to have the same name as their old home. Peter Corson, also from New Jersey was one of the first settlers to establish a home in the area and he was quite successful. Corson and his wife had 5 sons and 3 daughters and within less than 100 years they had descendants that were numbered by the hundred. In the late 1800s, Highland Lake, in the northern part of Shrewsbury Township was popular summer vacation destination. There were three large hotels on the lake as well as several summer cottages. The cottage holders included Pennsylvanians from as far away as Philadelphia which is approximately 100 mi southwest of Shrewsbury Township. Industry and farming are and always have been very limited in Shrewsbury Township, due to its mountainous terrain. The population as of the 2000 census has declined to 433 residents from 570 at the census of 1890.
As of the census of 2000, there were 433 people, 181 households, and 131 families residing in the township. The population density was 24.8 people per square mile. There were 252 housing units at an average density of 14.4/sq mi. The racial makeup of the township was 99.54% White and 0.46% Native American. There were 181 households, out of which 23.2% had children under the age of 18 living with them, 65.7% were married couplesliving together, 3.9% had a female householder with no husband present, and 27.6% were non-families. 24.3% of all households were made up of individuals, and 14.4% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.83. In the township the population was spread out, with 20.1% under the age of 18, 5.8% from 18 to 24, 26.8% from 25 to 44, 28.2% from 45 to 64, and 19.2% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 106.2 males. For every 100 females age 18 and over, there were 101.2 males. The median income for a household in the township was $36,389, and the median income for a family was $45,417. Males had a median income of $30,208 versus $23,750 for females. The per capita income for the township was $17,186. About 3.3% of families and 5.0% of the population were below the poverty line, including none of those under age 18 and 6.4% of those age 65 or over.
