Cities and towns

• Hammond
• Gary
• Merrillville
• Crown Point
• Schererville
• Hobart
• East Chicago
• St. John
• Munster
• Highland
• Cedar Lake
• Dyer
• Griffith
• Lake Station
• Lowell
• Winfield
• Whiting
• New Chicago
• Schneider

Unincorporated communities

• Lake Dalecarlia
• Lakes of the Four Seasons
• Leroy
• Ross
• Shelby