•
Cadyville was the area around a school house built in 1838. Starting in 1842, it had its own school district covering the southwest portion of the township, but was later absorbed by other school districts. •
Farmers Creek is an
unincorporated community at on the boundary between
Metamora Township on the east and Hadley Township to the west. It was named for the nearby stream. John L. Morse purchased land here in 1833 and settled in 1834. Brother John and Henry M. Look also settled here in 1834. Morse became the first postmaster on January 3, 1836, and the office operated until September 30, 1903. •
Hadley is an unincorporated community in the northern part of the township at . William Hart, Abraham Tunison, and Charles L. Cambell settled here in 1835. A post office opened on May 7, 1838, with John Mills, Jr. as the first postmaster.
Circa 1907, Franklin Hadley became postmaster and for fifty years some member of the Hadley family held the office. The Hadley post office, with
ZIP code 48440, provide P.O. box service to a small area within the township. •
Kerr Hill is identified as a populated place by the
USGS GNIS at . • The village of
Metamora is to the east, and the Metamora post office, with ZIP code 48455, also serves much of northern and eastern Hadley Township. • The city of
Lapeer is to the north-northeast, and the Lapeer post office, with ZIP code 48446, also serves a small portion of northwestern Hadley Township. • The village of
Goodrich is to the west in
Genesee County, and the Goodrich post office, with ZIP code 48438, also serves a portion of southwest Hadley Township. • The village of
Ortonville is to the south-southwest in
Oakland County, and the Ortonville post office, with ZIP code 48462, also serves portions of southern Hadley Township. • The village of
Oxford is to the southeast in Oakland County, and the Oxford post office, with ZIP code 48371, also serves a small portion of southeast Hadley Township. ==Geography==