Indiana State Route 25 runs in an east-west angle across Carroll County. It goes from the Tippecanoe/Carroll County Line, southwest of Delphi, northeast to the Carroll/Cass County Line, northeast of Burrows. This is a four-lane expressway throughout the county. IN St Rt 25 does not pass through any towns in Carroll County. IN St Rt 25 is not multi-plexed in Carroll County. IN St Rt 25 intersects the following highways in Carroll County. U.S. Rt. 421, near Delphi. Indiana State Route 18, near Delphi. Indiana State Route 39, near Delphi. Indiana State Route 218, near Delphi.
NB IN St Rt 25 at the Carroll/Tippecanoe County Line.