Illinois Route 3

Illinois Route 3 marker
Illinois Route 3
Map
IL 3 highlighted in red
Route information
Maintained by IDOT
Length187.44 mi[1] (301.66 km)
ExistedNovember 5, 1918[2]–present
Major junctions
South end US 51 / IL 37 in Cairo
Major intersections
North end IL 100 in Grafton
Location
CountryUnited States
StateIllinois
CountiesAlexander, Union, Jackson, Randolph, Monroe, St. Clair, Madison, Jersey
Highway system
IL 2 IL 4

Illinois Route 3 (IL 3) is a 187.44-mile-long (301.66 km) major north–south arterial state highway in southwestern Illinois. It has its southern terminus at Cairo Junction (about four miles (6.4 km) north of Cairo) at the intersection of U.S. Route 51 (US 51) and Illinois Route 37, and its northern terminus in Grafton at IL 100.

  1. ^ Illinois Technology Transfer Center (2007). "T2 GIS Data". Illinois Department of Transportation. Retrieved November 8, 2007.
  2. ^ Carlson, Rick (March 15, 2006). "Routes 1 through 20". Illinois State Highways Page. Retrieved March 24, 2006.[self-published source].