Wikipedia:WikiProject U.S. Roads/Indiana/Historical information from the 1920s
Most of the information here is from [1] and the maps on [2].
- State Road 1, New Albany to MI
- Now State Road 311, U.S. Route 31, U.S. Route 50, State Road 11, U.S. Route 31, State Road 933
- State Road 2, IL to OH
- Now U.S. Route 30
- State Road 3, IL to OH
- Now U.S. Route 40
- State Road 4, Sullivan to Bloomfield; Bedford to OH
- Now State Road 54; old US 50, State Road 235, State Road 135, U.S. Route 50
- State Road 5, Vincennes to New Albany
- Now U.S. Route 150
- State Road 6, Madison to Boswell
- State Road 7, IL to Fort Wayne
- Now U.S. Route 24
- State Road 8, Remington to Gary
- State Road 9, Linton to Brazil; Rockville to north of Turkey Run State Park
- Now State Road 59; county roads through Marshall
- State Road 10, Evansville to Whiting
- Now U.S. Route 41, State Road 352, Adeway Road, State Road 55, U.S. Route 24, U.S. Route 41, county roads through Lowell, Calumet Avenue, U.S. Route 41
- State Road 11, Greenfield to MI
- Now State Road 9
- State Road 12, Bruceville to Indianapolis
- Now State Road 67
- State Road 13, Lewisville to MI
- Now State Road 103, State Road 3, State Road 18, State Road 1, State Road 327, South Street, State Road 427, State Road 127
- State Road 14, Cannelton or Tell City to St. Croix
- Now State Road 37
- State Road 15, Indianapolis to Michigan City
- State Road 16, Mount Vernon to New Albany
- Now State Road 62, State Road 162, State Road 62
- State Road 17, Ligonier to Ohio
- Now U.S. Route 6
- State Road 18, Rockport to Jasper
- Now U.S. Route 231
- State Road 19, West of Tipton to Alexandria
- Now State Road 28
- State Road 20, Mount Vernon to Owensville
- State Road 21, Liberty to Fort Wayne
- Now U.S. Route 27
- State Road 22, east of St. Croix to Indianapolis
- Now State Road 37
- State Road 23, Fiat to north of Portland
- Now State Road 1, Walnut Corner Road
- State Road 24, Palmyra to Vallonia
- Now State Road 135
- State Road 25, Michigan City to OH
- Now U.S. Route 20, State Road 2, State Road 933, U.S. Route 20
- State Road 26, Bloomington to Madison
- State Road 27, Marion to Goshen
- Now State Road 15, State Road 13, State Road 114, State Road 15
- State Road 28, Winslow to Switz City
- State Road 29, Lafayette to south of Kokomo
- Now State Road 26
- State Road 30, where?
- State Road 31, Hillsdale to Indianapolis
- Now U.S. Route 36
- State Road 32, Bloomington to Lafayette
- State Road 33, IL to OH
- State Road 34, Brookville to Cambridge City
- Now State Road 1
- State Road 35, Kokomo to Roll
- State Road 36, Greensburg to Dunreith
- Now State Road 3
- State Road 37, Indianapolis to Muncie
- State Road 38, Jeffersonville to Hamburg
- Now U.S. Route 31
- State Road 39, Indianapolis to OH
- Now U.S. Route 52
- State Road 40, Princeton to West Baden Springs; Scottsburg to Aurora
- Now State Road 64, State Road 61, State Road 56; State Road 56, State Road 3, State Road 256, State Road 56
- State Road 41, Shoals to Mitchell
- State Road 42, Valparaiso to Rolling Prairie
- Now State Road 2
- State Road 43, IL to MI
- Now U.S. Route 12
- State Road 44, Lebanon to Monticello
- Now State Road 39
- State Road 45, Montmorenci to Wolcott
- Now U.S. Route 231
- State Road 46, Elkhart to Fort Wayne
- Now U.S. Route 33
- State Road 47, Chrisney to Tell City or Cannelton
- State Road 48, Connersville to OH
- Now Dunlapsville Road, State Road 101, U.S. Route 27
- State Road 49, where?
- State Road 50, Demotte to Argos
- Now State Road 10
- State Road 51, Elkhart to MI
- Now State Road 19
- State Road 52, where?
- State Road 53, Greensburg to Lawrenceburg
- State Road 54, Lyford to Covington
- State Road 55, Hebron to Valparaiso
- Now State Road 2