[6][7] According to the 2010 census, the township has a total area of 39.69 square miles (102.8 km2), all land.

An extensive drainage system was installed throughout the township which led to the draining of the slough areas, allowing for more farming.

White settlers cleared out a large portion of the trees for lumber.

Prior to this, the township was plentiful with walnut, beech, maple, elm, ash, willow and spicebush.

[8] Students in Prairie Township attend Tri-Central Community Schools.