U.S. Route 231 in Indiana

U.S. Route 231 marker
U.S. Route 231
Map
US 231 highlighted in red
Route information
Maintained by INDOT
Length284.277 mi[1] (457.499 km)
ExistedAugust 22, 1952[2]–present
Major junctions
South end US 231 at Kentucky state line
Major intersections
North end US 41 in St. John
Location
CountryUnited States
StateIndiana
CountiesSpencer, Dubois, Martin, Daviess, Greene, Owen, Putnam, Montgomery, Tippecanoe, White, Jasper, Porter, Lake
Highway system
  • Indiana State Highway System
SR 229 SR 232

U.S. Route 231 (US 231) is the longest numbered highway in Indiana, covering over 284 miles (457 km). It is a main north–south highway in the western part of the state. The southern terminus of US 231 in Indiana is at the Kentucky state line and the northern terminus is at US 41 just south of St. John. The highway is a mixture of expressway and two-lane roadway. The expressway portions exist mainly in southern Indiana and around the Lafayette-West Lafayette area, with the rest mainly being two lanes.

  1. ^ Indiana Department of Transportation (July 2016). Reference Post Book (PDF). Indianapolis: Indiana Department of Transportation. Retrieved February 9, 2017.
  2. ^ Weingroff, Richard (April 7, 2011). "US 231 – Indiana to Florida: How a Highway Grew". Highway History. Federal Highway Administration. Retrieved May 15, 2012.