Indiana State Road 75

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State Road 75

SR 75 highlighted in red
Route information
Maintained by INDOT
Length59.563 mi[1] (95.857 km)
Southern segment
Length36.896 mi[1] (59.378 km)
South end US 40
Major intersections US 136 in Jamestown
North end SR 47 in Thorntown
Northern segment
Length22.667 mi[1] (36.479 km)
South end US 421 / SR 38 / SR 39 near Frankfort
Major intersections SR 26 near Sedalia
SR 18 in Flora
North end SR 218 in Camden
CountryUnited States
CountiesBoone, Hendricks, Putnam, Carroll, Clinton
Highway system
  • Indiana State Highway System
I-74 I-80

State Road 75, the highest two-digit route in the U.S. state of Indiana consists of two discontinuous north–south segments.

Route description

Southern section

The southern section is about 37 miles (60 km) long. It begins at U.S. Route 40 at the Putnam-Hendricks county line and runs northward through the towns of Coatesville and North Salem in Hendricks County, and Jamestown and Advance in Boone County. There is a junction with U.S. Route 136 at Jamestown, and a junction with Interstate 74 just to the north. The northern terminus is at State Road 47 in the town of Thorntown.

Northern section

The northern section is 22.7 miles (36.5 km) long. It begins at U.S. Route 421 / State Road 38 / State Road 39 in Frankfort in Clinton County and runs northward, crossing State Road 26 east of Rossville, and passing through the town of Flora where it crosses State Road 18. The northern terminus is at State Road 218 in the town of Camden in Carroll County.

In August 2008, the Indiana Department of Transportation awarded Carroll County a grant of $1.2 million to be used to extend the road 3 miles (4.8 km) north, to connect with the planned relocation of State Road 25.


When the Owensboro Bridge between Owensboro, Kentucky and Rockport, Indiana opened in September 1940, its northern end connected to a new nine-mile (14 km) stretch of state highway through Spencer County that directed traffic to State Road 66. As the Kentucky highway which connected to the bridge was designated Kentucky Route 75, Indiana gave its connector road the same number.

In 1954, U.S. Route 231 was extended through Kentucky and Indiana, and the southernmost stretch of 231 in Indiana was routed along State Road 75. The Indiana Department of Highways removed State Road 75 from U.S. 231 in Spencer County by the early 1980s, along with all of U.S. 231's other concurrent designations throughout the state (others included State Road 45 and State Road 43).

In October 2002, with the opening of the William H. Natcher Bridge and the relocation of U.S. 231, this segment of highway was again redesignated, this time as the southern leg of State Road 161.

Major intersections

PutnamJefferson Township0.0000.000 US 40 – Brazil, IndianapolisSouthern terminus of SR 75
0.1770.285 SR 240 – Greencastle
HendricksMarion Township9.47815.253 US 36 – Rockville, Danville
North Salem17.05727.451 SR 236 – Danville
county line
SR 234 west – Ladoga
Western end of SR 234 concurrency
Boone22.23335.781 US 136 / SR 234 – Brownsburg, CrawfordsvilleEastern end of SR 234 concurrency and terminus of SR 234
I-74 – Indianapolis, DanvilleExit number 52 on I-74
Jefferson Township31.36550.477 SR 32 – Crawfordsville, Lebanon
Thorntown36.89659.378 SR 47 – CrawfordsvilleNorthern terminus of the southern section of SR 75
Gap in route
ClintonFrankfort36.89759.380 US 421 / SR 38 / SR 39 – Delphi, IndianapolisSouthern terminus of the northern section of SR 75
Owen Township46.14974.270 SR 26 – Lafayette, Kokomo
CarrollFlora55.18388.808 SR 18 – Delphi, Marion
Camden59.56395.857 SR 218Northern terminus of SR 75
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b c d Indiana Department of Transportation (July 2016). Reference Post Book (PDF). Indianapolis: Indiana Department of Transportation. Retrieved February 3, 2017.

External links