US 12 (West Michigan Avenue) runs diagonally through southern half of the township.

BL I-94 runs concurrently with US 23 briefly into the township before the business route ends at the I-94 interchange.

I-94 runs through the northern section of the township.

The source of Paint Creek is within the northeast portion of the township. Census Bureau, the township has a total area of 27.33 square miles (70.78 km 2), of which 27.26 square miles (70.60 km 2) is land and 0.07 square miles (0.18 km 2) (0.26%) is water. In 2006 the Ann Arbor District Library opened its Pittsfield branch. The name had been suggested by Ezra Carpenter. The township was organized as the Township of Pitt in 1834. When Ann Arbor Township was organized in 1827 it included what is now Pittsfield Township in its boundaries. The post office was reestablished under the name Pittsfield from September 1879 until it closed on December 31, 1907. In 1878, a railway line along the Toledo & Ann Arbor Railroad was constructed through the area.

The community was renamed Pittsfield in 1840. A post office named Pitt opened on Janubut closed on September 14, 1836. The settlement was formally named Pitt in 1831 and was named in honor of former English prime minister William Pitt. The county's first school, the McCracken School, was built here in 1825. George Noyes made the first land purchase in the area as early as 1824. Pittsfield is a former settlement within the township.Nebraska was a community settled in 1878 about 6.0 miles (9.7 km) east of Saline.The post office closed on January 23, 1840. It was named after the nearby stream Malletts Creek, and it was given a post office named Mallett's on June 4, 1834. Mallett's Creek is a former settlement within the township.Lucerne is a former settlement within the township that had its own post office from until July 5, 1853.The population was 34,663 at the 2010 census.

Pittsfield Charter Township is a charter township of Washtenaw County in the U.S.

Pittsfield charter township