Mosquito Twp is in the NE corner of CC. It is bounded on the north by the Sangamon Rover, on the west by Mt Auburn Twp, on the west by Macon County, and on the south by Stonington Twp. Mosquito Creek cuts across the north half of the township, running in a NW direction to the Sangamon River. In early times the borders of this stream were greatly infected with mosquitos, and it was from them that the Creek derived it's name. Mosquito Twp was originally formed a part of "Mt. Auburn Precinct" until the organization in March of 1866.