The Ohio River
The Ohio River forms Ohio's southern border.
Highland, Indiana is not in central or southern Indiana. It is in northwest Indiana close to Chicago, Illinois.
Ohio river
Indiana and Illinois
The Wabash River forms the southern portion of Indiana's western border. The northern portion of Indiana's western border is simply a straight line marked on the map. The southern border of Indiana is also a river - the Ohio.
The Ohio River is the southern boundary of Ohio and Indiana.
wabash
The Ohio river forms the boundary between Kentucky and the states of Ohio, Indiana and Illinois.
The Ohio river is located on the southern boundary of Indiana and Ohio. The Ohio River also borders northern Kentucky.
Ohio, Indiana & Illinois
The Wabash is the longest river in Indiana. It flows from Ohio across northern Indiana until it forms the border between Indiana and Illinois.