Bloomfield Township was cut out of Oil Creek Township in 1811 and named for Thomas Bloomfield, an early settler in the area. The boundaries as they known exist were formed in 1829.
Most of Bloomfield Township is drained by Oil Creek and its tributaries. These include Mosey Run, Bloomfield Run, West Shreve Run and East Shreve Run. The western end of the township is drained by Muddy Creek tributaries that are part of the French Creek watershed. Tributaries to South Branch French Creek drain the northeastern township. Bloomfield Township contains two prominent ridges, Shreve Ridge and Dutch Hill. Lake Canadohta is located roughly in the middle of the township. All of the township contains glacial sediments. Elevation of the township ranges from where Oil Creek leaves the township near Riceville, Pennsylvania to on Shreve Ridge at the Crawford-Erie county line.
Demographics
As of the census of 2000, there were 2,051 people, 757 households, and 560 families residing in the township. The population density was 54.0 people per square mile. There were 1,467 housing units at an average density of 38.6/sq mi. The racial makeup of the township was 99.12% White, 0.24% African American, 0.05% Native American, 0.05% Asian, and 0.54% from two or more races. Hispanic or Latino of any race were 0.34% of the population. There were 757 households, out of which 32.0% had children under the age of 18 living with them, 62.7% were married couplesliving together, 6.3% had a female householder with no husband present, and 26.0% were non-families. 20.6% of all households were made up of individuals, and 7.7% had someone living alone who was 65 years of age or older. The average household size was 2.68 and the average family size was 3.08. In the township the population was spread out, with 27.6% under the age of 18, 7.3% from 18 to 24, 28.2% from 25 to 44, 23.5% from 45 to 64, and 13.4% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 104.7 males. For every 100 females age 18 and over, there were 106.5 males. The median income for a household in the township was $36,307, and the median income for a family was $41,250. Males had a median income of $30,639 versus $22,250 for females. The per capita income for the township was $15,303. About 8.0% of families and 13.3% of the population were below the poverty line, including 16.8% of those under age 18 and 12.0% of those age 65 or over.
