Lines involved are generally identified by historic division (Div.), subdivision (SD), district (Dist.), or branch (Br.). Where a branch is identified with a railroad and not a name, it typically might be an industrial spur or another line with an uncertain identity.
Electric street or interurban railways are identified by "elec.", those railways generally are not covered here except where "steam" railroads are also involved. The more important electric railways in Illinois were Chicago Aurora & Elgin (CA&E), Chicago North Shore & Milwaukee (CNS&M), and Illinois Terminal (IT).
Railroads In Illinois
Historic tower and interlocking information is linked from the pages covering present and past lines, including histories and operating information. Included is information on all known past and present interlockings in Illinois.
Information on interlockings beyond the Chicago area is presently being expanded.
Obscure Railroads And Lines
Information on various obscure railroads and lines, not covered in the basic pages covering the main lines in the area.
Several larger cities had multiple interlocking towers. Information has been verified for the Chicago and St. Louis areas. But in other cities, because of historic inconsistencies in naming of interlockings and other factors, the locations are not always certain.
1889 1 JB Tower (West Chicago) EJ&E/C&NW Geneva SD/CB&Q Br. 2 East Joliet EJ&E/CRI&P/NYC Joliet Br. 3 Rockford IC Iowa Div./CB&Q Rockford & Flag Center SD 4 Mazonia C&A/EJ&E Illinois River SD 5 Chicago Heights NYC Joliet Br./C&EI 6 Chicago Heights EJ&E/C&EI 7 Beverly Jct. (Tower A) (Chicago) PRR Panhandle/CRI&P Beverly Br. 8 Peru CRI&P/CB&Q Streator & Zearing SD 9 Matteson EJ&E/IC 10 Calumet Park PRR SC&S Br./B&OCT/IHB 11 Kensington (Chicago) IC/C&WI Dolton Br. 12 Ash Street (Chicago) IC Iowa Div./AT&SF/Chicago Junction/B&OCT/PRR Panhandle 1890 13 Barrington EJ&E/C&NW Harvard SD 14 Grayland (South Mayfair) (Chicago) C&NW Cragin SD/CMSP&P C&M SD 15 CY Tower (Clybourn Jct.) (Chicago) C&NW Harvard SD/CMSP&P Bloomingdale Line 16 Spaulding CMSP&P Elgin SD/EJ&E 17 Leithton EJ&E/SOO 18 Coal City AT&SF/EJ&E Illinois River SD 19 Rondout CMSP&P C&M SD/EJ&E 20 Mayfair (Chicago) C&NW Harvard SD/CMSP&P C&M SD 21 Blue Island GTW/B&OCT/IHB 22 Chicago Ridge WAB Chicago-Decatur/IHB 23 47th Street (Chicago) C&WI 24 79th Street (Chicago) C&WI/CRI&P 25 Colona CRI&P/CB&Q Barstow SD 26 C&A Tower/Argo IHB/C&A 27 Dwight C&A/NYC Kankakee Br. 28 Bridgeport (Chicago) C&A/IC Iowa Div./AT&SF 29 Gardner C&A/NYC Kankakee & Seneca Br. 30 Galva CB&Q Mendota SD/CRI&P P&RI Br. 31 Washington Heights (Chicago) PRR Panhandle/CRI&P 32 Matteson NYC Joliet Br./IC 33 Jacksonville C&A Jacksonville Line/CB&Q Beardstown SD 34 Tower Hill NYC Illinois Div./B&O Springfield SD 1891 35 Gresham (Chicago) CRI&P 36 Tower A-5 (Pacific Jct.) (Chicago) CMSP&P C&M SD/CMSP&P Elgin SD 37 Glen (Glen Carbon) C&NW Madison SD/IC Springfield Dist./NKP Cloverleaf Dist. 38 61st Street (Chicago) CRI&P/NYC 39 South Aurora CB&Q/EJ&E Br. 40 Ottawa CRI&P/CB&Q Montgomery & Streator SD 41 Waukegan C&NW Kenosha SD/EJ&E 42 74th Street (Chicago) C&WI/WAB Chicago-Decatur/BRC 1892 43 Hawthorne (Chicago) IC Iowa Div./BRC 44 St. Anne C&EI/NYC Indiana Div. 45 Calumet River Drawbridge MC 46 40th Street (Chicago) CRI&P/Chicago Junction 47 West Pullman PRR Panhandle/IC Blue Island Br. 48 Thornton Jct. GTW/C&EI 49 Taylorville WAB Brooklyn Dist./B&O Springfield SD 50 Calumet River Drawbridge (Chicago) C&WI Dolton Br. possibly part of #142 51 Pontiac C&A/IC Pontiac Dist./WAB Streator Br. 52 Kansas NYC Illinois Div./CH&D Ohio River Div. 53 Corwith (Chicago) C&A/AT&SF 54 95th Street (Chicago) CRI&P 55 Pearl C&A Jacksonville Line drawbridge 56 Princeville AT&SF/CRI&P P&RI Br. 57 Hoopeston C&EI Woodland SD/NKP LE&W Main 58 Iles (Springfield) C&A/WAB Springfield Dist. 59 Midland (Paris) NYC Illinois Div./PRR Peoria Br. 60 East Kingston CMSP&P Davenport SD/C&NW Troy Grove SD 61 South Branch Chicago River B&OCT 62 Lemoyne (Chicago) BRC/C&A/AT&SF 63 Fulton Jct. C&NW Fulton Line/CMSP&P Savanna-Moline 64 Tower B-35 (Elgin) CMSP&P Elgin SD/C&NW Belvidere SD 65 Mount Vernon L&N Evansville Div./MP Pinckneyville SD 1893 66 26th St. Drawbridge (Chicago) B&OCT/Chicago Junction 67 Burnham PRR SC&S Br./NKP/C&WI/CSS&SB 68 Windsor NYC Illinois Div./WAB Sullivan Br. 69 Cragin Jct. (Chicago) CMSP&P Elgin SD/C&NW Cragin SD 70 43rd Street (Chicago) IC/Chicago Junction 71 Marshall Jct. PRR St. Louis Div./NYC Cairo Br. initially deactivated around 1908 72 Brookdale IC/B&O temporary 73 Sheldon NYC Indiana Div./TP&W 74 Deering Bridge (Chicago) C&NW Kenosha SD 75 Jacksonville Jct. C&A Jacksonville Line/WAB Springfield Dist./CP&StL J&H Line 76 Deval (Des Plaines) C&NW Harvard SD/C&NW Milwaukee SD/SOO 77 Grand Crossing (Chicago) NYC temporary 78 Grand Crossing (Chicago) NYC/PRR temporary 79 Karl (Mattoon) IC Peoria SD/NYC Illinois Div. 80 Alvin C&EI Woodland SD/IC Rantoul Dist. 81 Normal C&A/IC Amboy Dist. 82 Litchfield WAB Brooklyn Dist./IC Springfield Dist./CB&Q Beardstown SD/NYC Old Line 83 49th Street (Chicago) B&OCT/PRR Panhandle/GTW 84 Fairmount WAB/C&EI Brothers SD 85 Watseka C&EI/TP&W 86 Momence C&EI/NYC Kankakee Br. 87 Weldon (Chicago) IC 88 67th Street IC 89 81st Street (Hammond Jct.) (Chicago) C&WI 90 South Elmhurst CGW/IC Iowa Div./CA&E (elec.) 91 Harvey B&OCT Chicago Heights SD/GTW/IC 92 Kankakee River IC drawbridge/gauntlet 1894 93 Curran WAB/CP&StL CS&StL Line 94 75th Street (Chicago) B&OCT/PRR Panhandle/WAB Chicago-Decatur/BRC 95 Beverly Jct. (Tower B) (Chicago) PRR Panhandle/B&OCT/CRI&P Beverly Br. 96 Henry Street (Alton) CB&Q/C&A Old Line/NYC Old Line/CP&StL CS&StL Line/IT (elec.) 97 McCook IHB/AT&SF 98 Nashville L&N Evansville Div./MP Sparta SD 99 State Line C&WI/NKP/B&OCT/IHB Br./CSS&SB 100 WR Tower (Granite City) TRRA/C&A/NYC Illinois Div./WAB Brooklyn Dist. 1895 101 St. Elmo C&EI/PRR St. Louis Div. 102 Salem C&EI/B&O St. Louis Div. 103 Alhambra IC Springfield Dist./NKP Cloverleaf Dist. 104 River Branch Jct. (Chicago) PRR replaced with #394 105 VN Tower (Mount Vernon) C&EI/L&N Evansville Div./SR St. Louis Div. 106 Kinmundy IC/C&EI 107 Milan CRI&P P&RI Br. drawbridge 108 North Litchfield WAB Brooklyn Dist./IC Springfield Dist. 109 Rockwell Jct. (Chicago) C&NW Rockwell SD 110 Canal St. (Chicago) Metropolitan West Side Elevated Railroad (CTA) 111 Marshfield Ave. (Chicago) Metropolitan West Side Elevated Railroad (CTA) 112 Robey St. (Chicago) Metropolitan West Side Elevated Railroad (CTA) 113 Ford Street (Chicago) C&WI/PRR 114 Shops (Springfield) C&IM/WAB Springfield Dist. 115 Carbondale IC deactivated around 1912 1896 116 JA Tower (Springfield) C&A/B&O Springfield SD/CP&StL CS&StL Line 117 Tower B-12 (Franklin Park) CMSP&P Elgin SD/SOO 118 46th Avenue (Chicago) B&OCT Altenheim SD/BRC 119 South Chicago Tower E NYC/PRR temporary 120 South Chicago Tower W NYC/PRR temporary 121 Paxton IC/NKP LE&W Main 122 Winston (Litchfield) WAB Brooklyn Dist./IC Springfield Dist./CB&Q Beardstown SD/CP&StL CS&StL Line 123 Greenup PRR St. Louis Div./IC Mattoon Dist. 124 Riverdale IC/PRR Panhandle/B&OCT 125 Wesley Jct. (Peoria) P&PU/NKP LE&W Main 126 CR (Calumet River) (Chicago) NYC 127 Bridge Jct. (Peoria) P&PU/CRI&P Peoria Br. drawbridge 128 Edgewood IC/B&O Springfield SD 129 Burnside (Chicago) IC/C&WI/CRI&P South Chicago Br./BRC 1897 130 55th Street (Chicago) IHB Stock Yards Line/BRC 131 Centralia IC/CB&Q Beardstown SD 132 Burlington IA CB&Q Ottumwa SD drawbridge 133 Tamaroa IC/MP Pinckneyville SD 134 Mode C&EI/NKP Cloverleaf Dist. 135 Dolton PRR Panhandle/C&WI Dolton Br./B&OCT/IHB 136 Kittredge CMSP&P Davenport SD 137 Fulton No. 1 C&NW Fulton Line/CB&Q Lass & Ebner SD 138 Rochelle C&NW Geneva SD/CB&Q Aurora SD 139 Earlville CB&Q Mendota SD/C&NW Troy Grove SD 140 Market Street (Chicago) Metropolitan West Side Elevated Railroad (CTA) 141 South Branch Chicago River (Chicago) Metropolitan West Side Elevated Railroad (CTA) 142 Calumet River Drawbridge (Chicago) C&WI Dolton Br. 1898 143 Fulton No. 2 C&NW Fulton Line/CB&Q Lass & Ebner SD 144 Bellwood CGW/IHB/CA&E (elec.) 145 Sherman C&A 146 East Springfield C&A P&N Br./WAB Springfield Dist. 147 Monica AT&SF/CB&Q Yates City SD 148 East Clinton C&NW Geneva SD/CB&Q Lass & Ebner SD 149 East Yard (Pekin) C&A P&N Br./NYC Peoria & Eastern Line/AT&SF Pekin Dist. 150 Grove (Pekin) P&PU/C&A P&N Br. 151 North Harvey B&OCT Chicago Heights SD/IHB 152 Harvard Jct. (north) C&NW Harvard SD 153 Tolono IC/WAB 154 Monticello WAB Chicago-Decatur/IC Decatur Dist. deactivated around 1908 155 Ashley IC/L&N Evansville Div. 156 Joliet (old tower) CRI&P/C&A/AT&SF/NYC Joliet Br. 157 South Harvard C&NW Harvard SD 158 Mattoon IC 159 101st Street (Chicago) NYC 160 Laurette IC Gilman SD/IC Rantoul Dist. 161 Mazon AT&SF/NYC Kankakee & Seneca Br. 162 Monmouth CB&Q Ottumwa SD/M&SL 1899 163 Green Valley IC Peoria SD/C&A P&N Br. 164 Bureau Creek (E) CB&Q gauntlet bridge temporary 165 Bureau Creek (W) CB&Q gauntlet bridge temporary 166 Branch Jct. (Centralia) IC/MP Sparta SD 167 Mansfield WAB Chicago-Decatur/NYC Peoria & Eastern Line 168 East Dubuque IC Iowa Div./CB&Q Aurora SD drawbridge 169 Hawley C&A/IC temporary 170 Farrington (Terre Haute) PRR St. Louis Div. 171 Ohio Street Jct. (Chicago) C&NW 172 South Chicago Tower E NYC/B&O temporary 173 South Chicago Tower W NYC/B&O temporary 174 Vandalia PRR St. Louis Div./IC Clinton Dist. 175 Rose Hill (Chicago) C&NW Kenosha SD 176 Grayslake CMSP&P Fox Lake SD/SOO 177 Casey PRR St. Louis Div./CH&D Ohio River Div. 178 Smithboro PRR St. Louis Div./CB&Q Beardstown SD 179 Sabula CMSP&P Davenport SD drawbridge/gauntlet