Pittsfield Township has a total area of 27.3 square miles (70.8 km²), of which 27.3 square miles (70.6 km²) is land and 0.077 square miles (0.2 km²), or 0.25%, is water.
The source of Paint Creek is within the northeast portion of the township.
When Ann Arbor Township was organized in 1827, it included what is now Pittsfield Township in its boundaries. The name had been suggested by Ezra Carpenter. The current name was adopted in 1839. It became a charter township in 1972.
In 2006, the Ann Arbor District Library opened its Pittsfield branch.
Source: Wikipedia