The halfway point is Eastcleft, Ohio.
Hammond, Indiana
The city at the geographic halfway point between Sydney, Australia and Chicago, IL is Banana, Kiribati. The closest major city that is roughly halfway is Honolulu, HI.
Philladaliphia
Chicago, Illinois and Atlanta, Georgia are 719 miles apart. A city located halfway between them would be Bonnieville in Kentucky.
I'm going to assume you're in Michigan and you meant to type Lansing. The halfway point is Farwell.
Kalamazoo
Elk City, OK
Atlanta
From downtown Chicago, IL to Traverse City, MI there are approx. 288 miles.
Ragsdale, Arkansas.
North Royalton,OH