[3] Bloomfield Township was cut out of Oil Creek Township in 1811 and named for Thomas Bloomfield, an early settler in the area.

Geologic Province:[5] Northwestern Glaciated Plateau Lowest Elevation: 1,310 ft (400 m) where Oil Creek flows southward from the township.

Highest Elevation: 1,710 ft (520 m) in Shreve Ridge at the Crawford-Erie county line Places of high elevation: Shreve Ridge 1,710 ft (520 m) and Dutch Hill 1,560 ft (480 m) Major Rivers/Streams and Watersheds: Oil Creek, Muddy Creek, and South Branch French Creek Minor Rivers/Streams and Watersheds: Lakes and Waterbodies: Lake Canadohta (Glacial Lake) Biological Diversity Areas:[6] Lake Canadohta BDA and Little Federal Run Headwaters BDA [7] As of the census[9] of 2000, there were 2,051 people, 757 households, and 560 families residing in the township.

There were 1,467 housing units at an average density of 38.6 per square mile (14.9/km2).

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.