Bader is an unincorporated community in Schuyler County, Illinois, United States.

Bader is 3 miles (4.8 km) north of Browning.

The community was founded in 1870 under the name Osceola; it was later renamed after William Bader, who ran a grain elevator in the community.

A post office opened in the community on October 8, 1872, under the name Baders; it was shortened to Bader on December 23, 1907.

This Schuyler County, Illinois location article is a stub.