Posey, Vanderburgh, Warrick, Spencer, Perry, Crawford, Washington
Highway system
Indiana State Highway System
Interstate
US
State
Scenic
← SR 65
→ SR 67
State Road 66 is an east–west highway in seven counties in the southernmost portion of the U.S. state of Indiana.
^Indiana Department of Transportation (July 2016). Reference Post Book(PDF). Indianapolis: Indiana Department of Transportation. Retrieved December 22, 2016.
^"Road Numbers to Be Changed". The Hancock-Democrat. The Indianapolis News. September 30, 1926. Retrieved June 9, 2016 – via Newspapers.com.
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Global Information
SR 69 in Harmony Township
US 150 in Rego
