Medinah is an unincorporated community in the state of Illinois and is a northwest suburb of Chicago, located in DuPage County.

[2] In 1999, a group led by Jack Roeser and backed by Senator James Philip attempted to bring a charter school to Medinah.

The proposed Thomas Jefferson Charter School was met with NIMBY opposition by local residents.

In spite of this growth, Medinah has remained adamant in retaining its identity, occasionally conflicting with state agencies (such as the Illinois Department of Transportation, or IDOT) and other municipalities with regards to utilities and services.

A never-official but commonly used early name for the community was Meacham's Grove, Illinois.

Medinah is known for its large properties, with many homes situated on lot sizes of nearly an acre or more.

The boundaries of Medinah are more properly defined by the boundaries of its surrounding incorporated cities, but can be approximated by the Elgin-O'Hare Expressway to the north, Plum Grove Road to the west, Lake Street (U.S. Route 20) to the south and the Medinah Country Club to the east.