[3] Located in the southwest corner of the county, the township is home to the Indianapolis International Airport main terminal.

AmeriPlex, one of the largest industrial parks in Indiana, is in Decatur Township.

West Newton is a small Quaker-settled town inside the township.

[6] The Indianapolis Challenger Center calls Decatur Township home.

Camby (also sometimes called "West Union Station") is a neighborhood in western Decatur Township that also extends into neighboring Hendricks and Morgan counties, centered along Camby Road near State Road 67.