See also: List of Canadian railways
There are approximately 150,000 miles (240,000 km) of railroad track in the United States, nearly all standard gauge. The following is a partial list of United States railroads which currently operate there. For former railroads, see List of defunct United States railroads.
Class I railroads
Regional railroads
- Alaska Railroad (ARR) [8]
- Bessemer and Lake Erie Railroad (BLE)
- Bergen Passaic Rail Corp. (BPR) [9]
- Buffalo and Pittsburgh Railroad (BPRR) [10]
- Central Oregon and Pacific Railroad (CORP) [11]
- Chicago Fort Wayne and Eastern Railroad (CFER) [12]
- Dakota, Minnesota and Eastern Railroad (DME) [13]
- Dakota, Missouri Valley and Western Railroad (DMVW) [14]
- Duluth, Missabe and Iron Range Railway (DMIR)
- Elgin, Joliet and Eastern Railway (EJE) [15]
- Florida East Coast Railway (FEC) [16]
- Iowa, Chicago and Eastern Railroad (ICE) [17]
- Iowa Interstate Railroad (IAIS) [18]
- Kansas and Oklahoma Railroad (CKRY) [19]
- Kyle Railroad (KYLE) [20]
- Missouri and Northern Arkansas Railroad (MNA) [21]
- Montana Rail Link (MRL) [22]
- Montreal, Maine and Atlantic Railway (MMA) [23]
- Nebraska, Kansas and Colorado RailNet (NKCR)
- Nebraska Central Railroad (NCRC) [24]
- Nebraska Northeastern Railway (NENE)
- New York, Susquehanna and Western Railway (NYSW) [25]
- Niagara and Western Railway (NYWR) [26]
- Northern Plains Railroad
- Paducah and Louisville Railway (PAL) [27]
- Palouse River and Coulee City Railroad (PCC) [28]
- Pan Am Railways (BM, MEC, ST) [29]
- Portland and Western Railroad (PNWR) [30]
- Providence and Worcester Railroad (PW) [31]
- Red River Valley and Western Railroad (RRVW) [32]
- South Kansas and Oklahoma Railroad (SKOL) [33]
- Texas Mexican Railway (TM)
- Texas Pacifico Transportation
- Tuscola and Saginaw Bay Railway (TSBY) [34]
- Wheeling and Lake Erie Railway (WE) [35]
- Wisconsin and Southern Railroad (WSOR) [36]
Local railroads
- Aberdeen, Carolina and Western Railway (ACWR) [37]
- Aberdeen and Rockfish Railroad (AR) [38]
- Acadiana Railway (AKDN)
- Alabama and Gulf Coast Railway (AGR) [39]
- Alabama and Tennessee River Railway (ATN?) [40]
- Albany and Eastern Railroad (AERC) [41]
- Alexander Railroad (ARC) [42]
- Algers, Winslow and Western Railway (AWW)
- Aliquippa and Ohio River Railroad
- Almanor Railroad (AL)
- AN Railway (AN)
- Angelina and Neches River Railroad (ANR) [43]
- Ann Arbor Railroad (AA) [44]
- Apache Railway (APA)
- Arcade and Attica Railroad (ARA) [45]
- Arizona and California Railroad (ARZC) [46]
- Arizona Central Railroad (AZCR) [47]
- Arizona Railroad
- Arkansas and Missouri Railroad (AM) [48]
- Arkansas and Oklahoma Railroad
- Arkansas, Louisiana and Mississippi Railroad (ALM) [49]
- Arkansas Midland Railroad (AKMD) [50]
- Ashland Railway (ASRY)
- AT&L Railroad (ATLT)
- Athens Line (ABR)
- Atlantic and Western Railway (ATW)
- B&H Rail Corporation (BH) [51]
- Batten Kill Railroad
- Bauxite and Northern Railway (BXN)
- Bay Colony Railroad (BCLR) [52]
- Bay Line Railroad (BAYL)
- Belvidere and Delaware River Railway (BDRV) [53]
- Bath and Hammondsport Railroad [54]
- Blacklands Railroad (BLR) [55]
- Blackwell and Northern Railway (BNR)
- Bloomer Line (BLOL)
- Border Pacific Railroad (BOP) [56]
- Buckingham Branch Railroad (BB) [57]
- Caddo Valley Railroad
- Caldwell County Railroad (CWCY)
- Caney Fork and Western Railroad (CFWR)
- Carolina Coastal Railway
- Carolina Southern Railroad (CALA)
- Carrizo Gorge Railway (CZRY) [58]
- Cascade and Columbia River Railroad (CSCD) [59]
- Catskill Mountain Railroad (CMRR) [60]
- Cedar Rapids and Iowa City Railway (CIC) [61]
- Central Columbiana and Pennsylvania Railway (CQPA)
- Central Michigan Railway (CMGN)
- Central Montana Rail (CM)
- Central New England Railroad (CNZR)
- Central New York Railroad (CNYK) [62]
- Central Railroad of Indiana (CIND) [63]
- Central Railroad of Indianapolis (CERA) [64]
- Chattahoochee and Gulf Railroad (CHAT)
- Chattahoochee Industrial Railroad (CIRR)
- Chattooga and Chickamauga Railway (CCKY) [65]
- Chesapeake and Albemarle Railroad (CA) [66]
- Chicago SouthShore and South Bend Railroad (CSS) [67]
- City of Prineville Railway (COP) [68]
- Claremont Concord Railroad (CCRR) [69]
- Clarendon and Pittsford Railroad (CLP) [70]
- Colorado, Kansas and Pacific Railway
- Columbia Basin Railroad (CBRW) [71]
- Columbia and Cowlitz Railway (CLC)
- Columbus and Greenville Railway (CAGY) [72]
- Columbus and Ohio River Rail Road (CUOH) [73]
- Commonwealth Railway (CWRY) [74]
- Conecuh Valley Railroad (COEH)
- Connecticut Southern Railroad (CSO) [75]
- Copper Basin Railway (CBRY)
- D&I Railroad (DAIR) [76]
- Dakota Northern Railroad[1]
- Dakota Short Line
- Dardanelle and Russellville Railroad (DR)
- De Queen and Eastern Railroad (DQE)
- Delaware-Lackawanna Railroad
- Delta Southern Railroad (DSRR) [77]
- Depew, Lancaster and Western Railroad (DLWR)
- Dubois County Railroad (DCRR) [78]
- East Cooper and Berkeley Railroad (ECBR)
- East Tennessee Railway (ETRY)
- Eastern Alabama Railway (EARY) [79]
- Eastern Shore Railroad (ESHR)
- Eastern Idaho Railroad (EIRR) [80]
- Eastern Maine Railway (EMR) [81]
- Effingham Railroad (EFRR) [82]
- El Dorado and Wesson Railway
- El Dorado and Western Railway
- Elkhart and Western Railroad
- Escanaba and Lake Superior Railroad (ELS) [83]
- Everett Railroad (EV) [84]
- Falls Road Railroad (FRR)
- Finger Lakes Railway (FGLK) [85]
- Florida Central Railroad (FCEN) [86]
- Florida Midland Railroad (FMID) [87]
- Florida Northern Railroad (FNOR) [88]
- Florida West Coast Railroad (FWCR)
- Fredonia Valley Railroad (FVRR)
- Fulton County Railroad (FC)
- Fulton County Railway (FCR)
- Georgetown Railroad (GRR) [89]
- Georgia and Florida RailNet (GFRR)
- Georgia Central Railway (GC)
- Georgia Midland Railroad (GMR)
- Georgia Northeastern Railroad (GNRR) [90]
- Georgia Southwestern Railroad (GSWR) [91]
- Georgia Woodlands Railroad (GWRC) [92]
- Gettysburg and Northern Railroad
- Gloster Southern Railroad (GLSR)
- Golden Isles Terminal Railroad (GITM)
- Golden Triangle Railroad (GTRA)
- Grainbelt Corporation (GNBC)
- Grand Rapids Eastern Railroad (GR) [93]
- Great Northwest Railroad (GRNW) [94]
- Great Smoky Mountains Railroad (GSMR) [95]
- Great Walton Railroad Company (GRWR)
- Great Western Railway of Colorado (GWR) [96]
- Green Mountain Railroad (GMRC) [97]
- Gulf, Colorado and San Saba Railway (GCSR)
- Hampton Railway
- Hampton and Branchville Railroad (HB)
- Hartwell Railroad (HRT)
- Heart of Georgia Railroad (HOG) [98]
- Hollidaysburg and Roaring Spring Railroad
- Hollis and Eastern Railroad (HE)
- Hoosier Southern Railroad (HOS) [99]
- Housatonic Railroad (HRR)
- Huntsville and Madison County Railroad Authority (HMCR) [100]
- Huron and Eastern Railway (HESR) [101]
- Idaho Northern and Pacific Railroad (INPR) [102]
- Illinois and Midland Railroad (IMRR) [103]
- Illinois RailNet (IR)
- Illinois Western Railroad
- Indiana Rail Road (INRD) [104]
- Indiana Northeastern Railroad (IN)
- Indiana and Ohio Central Railroad
- Indiana and Ohio Railway (IORY) [105]
- Indiana Southern Railroad (ISRR) [106]
- Iowa Northern Railway (IANR)
- Iowa Northwestern Railroad (IANW)
- Iowa Traction Railroad (IATR)
- Juniata Valley Railroad (JVRR) [107]
- Kankakee, Beaverville and Southern Railroad (KBSR)
- Kentucky and Tennessee Railway (KT)
- Keokuk Junction Railway (KJRY) [108]
- Kiamichi Railroad (KRR) [109]
- Knox and Kane Railroad (KKRR)
- Kosciusko and Southwestern Railway (KSRY?) [110]
- KWT Railroad (KWT)
- Lake State Railway (LSRC) [111]
- Lake Superior and Ishpeming Railroad (LSI)
- Lancaster and Chester Railway (LC) [112]
- Laurinburg and Southern Railroad (LRS)
- Lewis and Clark Railway
- Little Rock and Western Railway (LRWN)
- Livonia, Avon and Lakeville Railroad (LAL) [113]
- Louisiana and Delta Railroad (LDRR) [114]
- Louisiana and North West Railroad (LNW)
- Louisville and Indiana Railroad (LIRC) [115]
- Lowville and Beaver River Railroad
- Luxapalila Valley Railroad (LXVR) [116]
- Lycoming Valley Railroad (LVRR) [117]
- M and B Railroad (MB) (MNBR)
- Madison Railroad (CMPA) [118]
- Maine Eastern Railroad (ME) [119]
- Maryland and Delaware Railroad (MDDE) [120]
- Maryland Midland Railway
- Massachusetts Central Railroad (MCER) [121]
- McCloud Railway (MCR)
- Meridian Southern Railway (MDS)
- Mid-Michigan Railroad (MMRR) [122]
- Maryland Midland Railway (MMID) [123]
- Middletown and Hummelstown Railroad (MIDH) [124]
- Middletown and New Jersey Railway (MNJ)
- Milford-Bennington Railroad
- Minnesota, Dakota and Western Railway (MDW)
- Minnesota Northern Railroad (MNN)
- Minnesota Prairie Line (MPLI)
- Minnesota Southern Railway (MSWY)
- Mississippi Export Railroad (MSE) [125]
- Mississippi and Skuna Valley Railroad (MSV)
- Mississippian Railway Cooperative (MSRW)
- Morristown and Erie Railway (ME) [126]
- Mohawk, Adirondack and Northern Railroad
- Mount Hood Railroad (MH) [127]
- Nash County Railroad (NCYR)
- Nashville and Eastern Railroad (NERR)
- Naugatuck Railroad (NAUG) [128]
- Nebkota Railway (NRI)
- Nebraska Central Railroad (NCRC) [129]
- Nebraska Northeastern Railway (NENE)
- New England Central Railroad (NECR) [130]
- New England Southern Railroad
- New Hampshire Central Railroad
- New Hampshire Northcoast Corporation (NHN)
- New Hope and Ivyland Railroad
- New York and Atlantic Railway (NYA) [131]
- New York and Greenwood Lake Railway (NYGL)
- New York and Lake Erie Railroad (NYLE) [132]
- New York and Ogdensburg Railway (NYOG) [133]
- New York Susquehanna and Western Railway (NYSW) [134]
- Nittany and Bald Eagle Railroad (NBER) [135]
- North Shore Railroad (NSHR) [136]
- Northwestern Pacific Railway
- Octoraro Railroad
- Ogeechee Railway (OGEE)
- Ohio Central Railroad (OHCR) [137]
- Ohio and Pennsylvania Railroad
- Ohio Southern Railroad
- Oil Creek and Titusville Lines (OCTL) [138]
- Old Augusta Railroad (OAR)
- Ontario Central Railroad
- Ontario Midland Railroad (OMID)
- Otter Tail Valley Railroad (OTVR) [139]
- Ouachita Railroad (OUCH)
- Owego and Harford Railway [140]
- Panhandle Northern Railroad (PNR) [141]
- Pee Dee River Railway
- Pearl River Valley Railroad (PRV)
- Pecos Valley Southern Railway (PVS)
- Pend Oreille Valley Railroad (POVA)
- Penn Eastern Rail Lines (PRL)
- Pickens Railway (PICK)
- Pioneer Valley Railroad (PVRR) [142]
- Point Comfort and Northern Railway (PCN)
- Prescott and Northwestern Railroad (PNW)
- Progressive Rail (PGR) [143]
- Puget Sound and Pacific Railroad (PSAP) [144]
- R. J. Corman Railroad Bardstown Line (RJCR) [145]
- R. J. Corman Railroad Cleveland Line (RJCL) [146]
- R. J. Corman Railroad Central Kentucky Lines (RJCC) [147]
- R. J. Corman Railroad Memphis Line (RJCM) [148]
- R. J. Corman Railroad Western Ohio Lines (RJCW) [149]
- R. J. Corman Railroad Pennsylvania Lines (RJCP) [150]
- Rarus Railway (RARW)
- Reading Blue Mountain and Northern Railroad
- Redmont Railway (RRCI)
- Riceboro Southern Railway (RSOR)
- Rochester and Southern Railroad (RSR) [151]
- Rock and Rail (RRRR)
- Rockdale, Sandow and Southern Railroad (RSS)
- Roscoe, Snyder and Pacific Railroad (RSAP)
- Sabine River and Northern Railroad (SRN)
- Saginaw Valley Railway
- Salt Lake, Garfield and Western Railway
- San Diego and Arizona Eastern Railway (SDAE) [152]
- San Diego and Imperial Valley Railroad (SDIY) [153]
- San Diego Northern Railroad (SDNR) [154]
- San Joaquin Valley Railroad
- San Luis and Rio Grande Railroad (SLRG) [155]
- San Luis Central Railroad (SLC)
- San Manuel Arizona Railroad (SMA)
- Sand Springs Railway (SS) [156]
- Sandersville Railroad (SAN)
- Santa Fe Southern Railway (SFSR) [157]
- Santa Maria Valley Railroad (SMV) [158]
- St. Croix Valley Railroad
- St. Lawrence and Atlantic Railroad (SLR) [159]
- St. Mary's Railroad (SM) [160]
- Savannah Port Terminal Railroad (SAPT)
- Seminole Gulf Railway (SGLR) [161]
- Sequatchie Valley Railroad (SQVR)
- Shamokin Valley Railroad (SVRR) [162]
- Sierra Northern Railway (SERA?) [163]
- Sisseton Milbank Railroad (SMRR)
- SMS Rail Service (SLRS) [164]
- South Branch Valley Railroad (SBVR) [165]
- South Central Florida Express (SCFE) [166]
- South Central Tennessee Railroad (SCTR)
- Southern Freight Railroad (?)
- Southern Indiana Railway
- Southern Railroad of New Jersey (SRNJ)
- Stillwater Central Railroad (SLWC) [167]
- Stockton Terminal and Eastern Railroad (STE) [168]
- Stourbridge Railroad (SBRR) [169]
- Sunflour Railroad
- Tacoma Rail (TMBL & TRMW) [170]
- Tenneken Railroad
- Tennessee Southern Railroad (TSRR) [171]
- Texas-New Mexico Railroad (TNMR)
- Texas North Western Railway (TXNW)
- Texas and Northern Railway (TN)
- Texas Rock Crusher Railway (TXR)
- Thermal Belt Railway (TBRY)
- Three Notch Railroad (TNHR)
- Timber Rock Railroad (TIBR) [172]
- Toledo, Peoria and Western Railway (TPW) [173]
- Tomahawk Railway (TR)
- Toppenish, Simcoe and Western Railroad
- Trona Railway (TRC)
- Tulsa-Sapulpa Union Railway (TSU) [174]
- Twin Cities and Western Railroad (TCWR) [175]
- Tyburn Railroad (TYBR)
- Union County Industrial Railroad (UCIR) [176]
- Utah Railway (UTAH) [177]
- V and S Railway
- Valdosta Railway (VR)
- Vandalia Railroad (VRRC) [178]
- Ventura County Railroad
- Vermont Railway (VTR) [179]
- Wallowa Union Railroad Authority (WURR)
- Warren and Saline River Railroad (WSR)
- Washington County Railroad
- Wellsboro and Corning Railroad (WCOR) [180]
- West Isle Line
- West Tennessee Railroad (WTNN)
- West Texas and Lubbock Railway (WTLR)
- West Virginia Central Railroad (WVC) [181]
- Western Kentucky Railway (WKRL)
- Western New York and Pennsylvania Railroad (WNYP) [182]
- Western Rail Road (WRRC)
- Willamette and Pacific Railroad (WPRR)
- Winchester and Western Railroad (WW)
- Wiregrass Central Railroad (WGCR)
- Wyoming and Colorado Railroad
- Yadkin Valley Railroad (YVRR)
- York Railway (YRC)
- Yreka Western Railroad (YW) [183]
Switching and terminal railroads
- Adrian and Blissfield Rail Road (ADBF) [184]
- Akron Barberton Cluster Railway (AB)
- Alabama and Florida Railway (AF) [185]
- Alabama Railroad (ALAB) [186]
- Albany Port Railroad (ALBY)
- Alamo Gulf Coast Railroad (AGCR) [187]
- Allegheny Valley Railroad
- Alton and Southern Railroad [188]
- Amador Foothills Railroad [189]
- Appanoose County Community Railroad (APNC)
- Arizona and Eastern Railway (AZER) [190]
- Ashtabula, Carson and Jefferson Railroad (ACJR) [191]
- Augusta and Summerville Railroad
- Austin Area Terminal Railroad (AATR)
- Ballard Terminal Railroad (BDTL)
- Belt Railway of Chicago (BRC) [192]
- Bergen Passaic Terminal Railroad (BPTR) [193]
- Bighorn Divide and Wyoming Railroad (BDW)
- Birmingham Southern Railroad (BS) [194]
- Black River and Western Railroad (BRW) [195]
- Boone and Scenic Valley Railroad (BSVY) [196]
- Boot Hill and Western Railway (BHWY)
- Brandon Corporation (BRAN)
- Brandywine Valley Railroad (BVRY)
- Brownsville and Rio Grande International Railroad (BRG) [197]
- Buffalo Southern Railroad (BSOR) [198]
- Burlington Junction Railway (BJRY)
- C & NC Railroad (CNUR)
- C&S Railroad
- California Northern Railroad (CFNR) [199]
- Camp Chase Industrial Railroad (CCRA)
- Canton Railroad (CTN) [200]
- Cape Fear Railways (CF)
- Carolina Piedmont Railroad (CPDR) [201]
- Carolina Rail Service (CRIJ)
- Central California Traction Company
- Central Illinois Railroad (CIRY)
- Central Midland Railway (CMR) [202]
- Chestnut Ridge Railway (CHR)
- Chicago Rail Link (CRL) [203]
- Chillicothe-Brunswick Rail Authority
- Cimarron Valley Railroad (CVR)
- City of Rochelle Railroad
- Clinton Terminal Railroad (CTR)
- Cloquet Terminal Railroad (CTRR)
- CMC Railroad
- Coe Rail (CRLE)
- Colorado and Wyoming Railway (CW)
- Columbia Terminal (CT) [204]
- Conemaugh and Black Lick Railroad (CBL) [205]
- Connotton Valley Railway (CV?)
- Conrail (CSAO) [206]
- Corpus Christi Terminal Railroad (CCTA) [207]
- Crab Orchard and Egyptian Railroad (COER)
- Dakota Southern Railway
- Dallas, Garland and Northeastern Railroad (DGNO) [208]
- Decatur Junction Railway (DT) [209]
- Delray Connecting Railroad (DC) [210]
- Delta Valley and Southern Railway (DVS)
- Denver Rock Island Railroad (DRIR)
- East Camden and Highland Railroad (EACH) [211]
- East Chattanooga Belt Railway
- East Erie Commercial Railroad (EEC)
- East Jersey Railroad and Terminal Company (EJR) [212]
- East Penn Railways
- Eastern Illinois Railroad (EIRC)
- Ellis and Eastern Company
- Farmrail Corporation (FMRC) [213]
- Flats Industrial Railroad (FIR)
- Fordyce and Princeton Railroad (FP)
- Fore River Transportation Corporation (FOR)
- Fort Smith Railroad
- Fort Worth and Western Railroad (FWWR) [214]
- Galveston Railroad (GVSR) [215]
- Garden City Western Railway (GCW) [216]
- Golden Isles Terminal Railroad (GITM)
- Grafton and Upton Railroad (GU)
- Great Miami and Scioto Railway (GMRY) [217]
- Great River Railroad (GTR)
- Great Western Railway of Iowa
- High Point, Thomasville and Denton Railroad
- Hutchinson and Northern Railway (HN)
- Indian Creek Railroad (ICRK)
- Indiana Harbor Belt Railroad (IHB) [218]
- Indiana Southwestern Railway
- ISG Cleveland Works Railway (CUVA)
- ISG South Chicago and Indiana Harbor Railway (SCIH)
- Kansas City Terminal Railway (KCTL)
- Jefferson Warrior Railroad (JEFW)
- Kendallville Terminal Railway
- Kiski Junction Railroad (KJR) [219]
- Knoxville and Holston River Railroad (KXHR)
- Lake County Railroad (LCR) [220]
- Lake Terminal Railroad (LT)
- Landsville Terminal and Transfer Company
- Little Kanawha River Rail (LKRR)
- Little Rock Port Railroad (LRPA)
- Longview Switching Company
- Los Angeles Junction Railway
- Louisville, New Albany and Corydon Railroad (LNAC)
- Luzerne and Susquehanna Railway
- Mahoning Valley Railway (MVRY)
- Manufacturers' Junction Railway (MJ) [221]
- Manufacturers Railway (MRS) [222]
- Massena Terminal Railroad (MSTR)
- Maumee and Western Railroad
- McKeesport Connecting Railroad
- Meeker Southern Railroad
- MG Rail (MGRI)
- Michigan Shore Railroad
- Michigan Southern Railroad
- Minnesota Commercial Railway (MNNR) [223]
- Mississippi Central Railroad (MSCI) [224]
- Mississippi Delta Railroad (MSDR)
- Mississippi Tennessee Railroad (?)
- Missouri and Valley Park Railroad
- Modesto and Empire Traction Company (MET) [225]
- Moscow, Camden and San Augustine Railroad
- Mount Vernon Terminal Railway
- Municipality of East Troy Railroad (METW) [226]
- N. D. C. Railroad
- Napa Valley Railroad (NVRR) [227]
- Nashville and Western Railroad
- New Castle Industrial Railroad (NCIR)
- New Orleans and Gulf Coast Railway (NOGC) [228]
- New Orleans Public Belt Railroad (NOPB) [229]
- New York Cross Harbor Railroad Terminal (NYCH) [230]
- Newburgh and South Shore Railroad (NSR) [231]
- North Carolina and Virginia Railroad (NCVA) [232]
- Northern Ohio and Western Railway (NOW)
- Northwestern Oklahoma Railroad (NOKL)
- Oakland Terminal Railway (OTR)
- Ohi-Rail Corporation (OHIC)
- Omaha Lincoln and Beatrice Railway (OLB)
- Oregon Pacific Railroad
- Owego and Harford Railway
- Pacific Harbor Line (PHL) [233]
- Patapsco and Back Rivers Railroad (PBR)
- Peninsula Terminal Company
- Pennsylvania Southwestern Railroad (PSWR)
- Peoria and Pekin Union Railway (PPU)
- Philadelphia, Bethlehem and New England Railroad (PBNE)
- Pioneer Industrial Railway (PRY)
- Pittsburgh, Allegheny and McKees Rocks Railroad (PAM)
- Pittsburgh and Ohio Central Railroad
- Port Bienville Railroad (PBVR) [234]
- Port Jersey Railroad (PJRR) [235]
- Port Terminal Railroad Association
- Port Terminal Railroad of South Carolina (PTR)
- Port of Tillamook Bay Railroad (POTB) [236]
- Port Utilities Commission of Charleston, South Carolina (PUCC)
- Portland Terminal Railroad
- Quincy Railroad (CA) (QRR)
- R. J. Corman Railroad Allentown Lines (RJCN) [237]
- Railroad Switching Service of Missouri (?)
- Raritan Central Railway (RCRY)
- Republic N and T Railroad
- Richmond Pacific Railroad (RPRC) [238]
- Rio Valley Switching Company (RVSC)
- Riverport Railroad (RVPR) [239]
- St. Maries River Railroad (STMA)
- Salt Lake City Southern Railroad
- San Joaquin Valley Railroad (SJVR) [240]
- San Pedro Southwestern Railroad (SWKR)
- Santa Cruz, Big Trees and Pacific Railway (SCBG)
- Savannah Port Terminal Railroad (SPTR)
- Semo Port Railroad (SE) [241]
- Shawnee Terminal Railway (STR) [242] (formerly Cairo Terminal Railroad)
- Sidney and Lowe Railroad (SLGG)
- South Brooklyn Railway
- South Buffalo Railway (SB) [243]
- South Carolina Central Railroad (SCRF) [244]
- South Plains Lamesa Railroad (SLAL)
- South Plains Switching
- Southern Switching Company (SSC)
- Southwest Pennsylvania Railroad
- Southwestern Railroad (SW)
- Strasburg Rail Road (SRC) [245]
- Tacoma Rail (TMBL & TRMW) [246]
- Talleyrand Terminal Railroad (TTR) [247]
- Terminal Railroad Association of St. Louis (TRRA)
- Terminal Railway Alabama State Docks (TASD) [248]
- Texas Central Business Lines (TCB) [249]
- Texas City Terminal Railway
- Texas, Gonzales and Northern Railway (TXGN)
- Texas South-Eastern Railroad (TSE)
- Tishomingo Railroad (TISH) [250]
- Towanda-Monroeton Shipper Lifeline
- Tri-City and Olympia Railroad (TCRY) [251]
- Turners Island, LLC
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