This is a list of current shortline railroads (FRA Class III) in the United States. The reporting mark assigned by the Association of American Railroads (AAR) is listed for each entry.

Alabama

RailroadAAR rep. markOwner/LesseeAlabama & Tennessee River RailwayATNOmniTRAXAlabama Southern RailroadABSWatcoAlabama Warrior RailwayABWRWatcoAutauga Northern RailroadAUTWatcoBay Line RailroadBAYLGenesee and WyomingBirmingham Terminal RailwayBHRRWatcoColumbus & Chattahoochee RailroadCHHGenesee and WyomingCG RailwayCGRGenesee and WyomingConecuh Valley RailroadCOEHGenesee and WyomingEastern Alabama RailwayEARYGenesee and WyomingGeorgia Southwestern RailroadGSWRGenesee and WyomingHuntsville & Madison County Railroad AuthorityHMCROmniTRAXLuxapalila Valley RailroadLXVRGenesee and Wyoming Meridian & Bigbee RailroadMNBRGenesee and WyomingSequatchie Valley RailroadSQVRTerminal Railway Alabama State DocksTASD Alabama State Port AuthorityThree Notch RailroadTNHRGenesee and WyomingTennessee Southern RailroadTSRRPatriot Rail CompanyWiregrass Central RailroadWGCRGenesee and Wyoming

Arizona

RailroadAAR rep. markOwner/LesseeApache RailwayAPAArizona & California RailroadARZCGenesee and WyomingArizona Central RailroadAZCRArizona Eastern RailwayAZERGenesee and WyomingClarkdale Arizona Central RailroadAZCRCopper Basin RailwayCBRYDrake Switching CompanyKingman Terminal RailroadKGTRPatriot Rail CompanySan Pedro Valley RailroadSPSRGenesee and Wyoming

Arkansas

RailroadAAR rep. markOwner/LesseeArkansas & Missouri RailroadAMArkansas Southern RailroadARSWatcoDardanelle and Russellville RailroadDRFort Smith RailroadFSRPioneer Railcorp

California

RailroadAAR rep. markOwner/LesseeCalifornia Northern RailroadCFNRGenesee and WyomingCalifornia Western RailroadCWRCarrizo Gorge RailwayCZRYCentral California TractionCCTMcCloud RailwayMCRModesto & Empire Traction CompanyMETMountain Pacific RailroadMPRNorthwestern Pacific RailroadNWPPacific Harbor LinePHLPacific Sun RailroadPSRRWatcoRichmond Pacific RailroadRPRCSt. Paul & Pacific RailroadSPPProgressive Rail Inc. San Diego & Imperial Valley RailroadSDIYGenesee and WyomingSan Francisco Bay RailroadSFBRSan Joaquin Valley RailroadSJVRGenesee and WyomingSanta Maria Valley RailroadSMVSierra Northern RailwaySERATrona RailwayTRC

Colorado

RailroadAAR rep. markOwner/LesseeDenver Rock Island RailroadDRIRGreat Western Railroad of ColoradoGWRRock & RailRRRRSan Luis & Rio Grande RailroadSLRG

Connecticut

RailroadAAR rep. markOwner/LesseeBranford Steam RailroadBRFDHousatonic Railroad HRRCCentral New England RailroadCNZRConnecticut Southern RailroadCSORGenesee and Wyoming

Delaware RailroadAAR rep. markOwner/LesseeDelmarva Central RailroadDCREast Penn RailroadESPNRegional RailMaryland & Delaware RailroadMDDEWilmington & Western RailroadWWRC

Florida RailroadAAR rep. markOwner/LesseeAN RailwayAN Genesee and WyomingBay Line RailroadBAYL Genesee and WyomingFirst Coast Railroad FCRD Genesee and WyomingNASA RailroadNLAXSeminole Gulf RailwaySGLRBay Colony RailroadSouth Central Florida ExpressSCFE

Georgia RailroadAAR rep. markOwner/LesseeChattahoochee Industrial RailroadCIRR Genesee & WyomingGeorgia Central RailwayGC Genesee & WyomingGeorgia Northeastern RailroadGNRRPatriot Rail CompanyGeorgia Southwestern RailroadGSWR Genesee & WyomingSandersville RailroadSANSt. Mary's RailroadSMValdosta RailwayVR Genesee & Wyoming

Idaho RailroadAAR rep. mark Owner/LesseeBoise Valley RailroadBVRR WatcoEastern Idaho RailroadEIRR WatcoGreat Northwest RailroadGRNW WatcoIdaho Northern and Pacific RailroadINPR Rio Grande PacificPend Oreille Valley RailroadPOVRSt. Maries River RailroadSTMA

Illinois RailroadAAR rep. markOwner/LesseeBloomer LineBLOLCentral Illinois RailroadCIRYChicago Junction RailwayCJRProgressive Rail, Inc.Chicago, St. Paul & Pacific RailroadCSPProgressive Rail IncCrab Orchard and Egyptian RailwayCOERProgressive Rail IncDecatur Junction RailwayDTPioneer RailcorpEastern Illinois RailroadEIRCFisher Farmers Grain & Coal RailroadFFGCFoster Townsend Rail LogisticsFTRLIllinois RailwayIROmniTRAXKeokuk Junction RailwayKJRYPatriot Rail CompanyPeoria & Western RailwayPWRYTazewell & Peoria RailroadTZPRGenesee and WyomingToledo, Peoria and Western RailwayTPWGenesee and Wyoming

Indiana RailroadAAR rep. markOwner/LesseeAlgers, Winslow & Western RailwayAWWBee Line RailroadBLEXCentral Indiana and Western RailroadCEIWCentral Railroad Company of IndianaCINDGenesee and WyomingCentral Railroad Company of IndianapolisCERAGenesee and WyomingChesapeake and Indiana RailroadCKINGulf & Atlantic RailwaysChicago, Fort Wayne & Eastern RailroadCFEGenesee and WyomingChicago South Shore & South Bend RailroadCSSAnacostia Rail Holdings CompanyDubois County RailroadDCRRElkhart and Western RailroadEWRPioneer RailcorpEvansville Western RailwayEVWRP&L TransportationFulton County RailroadFCGrand Elk RailroadGDLKWatcoHoney Creek RailroadHCRRHoosier Southern RailroadHOSIndian Creek RailroadICRKIndiana Harbor Belt RailroadIHBIndiana Northeastern RailroadINIndiana Southern RailroadISRRGenesee and WyomingIndiana Southwestern RailwayISWPatriot Rail Kankakee, Beaverville and Southern RailroadKBSRLouisville and Indiana RailroadLIRCAnacostia Rail Holdings CompanyLucas Oil Rail LineLORLMadison RailroadCMPAToledo, Peoria and Western RailwayTPWGenesee and WyomingVermilion Valley RailroadVVRRGulf & Atlantic RailwaysWabash Central RailroadWBCR

Iowa RailroadAAR rep. markOwner/LesseeBurlington Junction RailwayBJRYCedar Rapids and Iowa City RailwayCICIowa Northern RailwayIANRProgressive RailIowa Traction RailwayIATRProgressive Rail

Kansas RailroadAAR rep. markOwner/LesseeKansas & Oklahoma RailroadKOWatcoKansas City Terminal RailwayKCTWatcoKaw River RailroadKAWWatcoKyle RailroadKYLEGenesee and WyomingSouth Kansas & Oklahoma RailroadSKOLWatco

Louisiana RailroadAAR rep. markOwner/LesseeBaton Rouge Southern RailroadBRSWatcoLouisiana Southern RailroadLASWatcoNew Orleans and Gulf Coast RailwayNOGCRio Grande Pacific CompanyNew Orleans Public Belt RailroadNOPB

Maine RailroadAAR rep. markOwner/LesseeEastern Maine Railway (1995)EMRYMaine Northern RailwayMNRYSt Lawrence & Atlantic RailroadSLRGenesee and Wyoming

Maryland RailroadAAR rep. markOwner/LesseeDelmarva Central RailroadDCRMaryland & Delaware RailroadMDDEMaryland Midland RailwayMMIDGenesee and WyomingTradepoint RailTPR

Massachusetts RailroadAAR rep. markOwner/LesseeEast Brookfield & Spencer RailroadEBSRFore River RailroadFRVTGrafton & Upton RailroadGUMassachusetts Central RailroadMCERPioneer Valley RailroadPVRRGulf & Atlantic Railways

Michigan RailroadAAR rep. markOwner/LesseeAdrian and Blissfield Rail RoadADBFAnn Arbor RailroadAAWatcoCharlotte Southern RailroadCHSCoopersville and Marne RailwayCPMYDelray Connecting RailroadDCTranstar, Inc.Detroit Connecting RailroadDCONEscanaba and Lake Superior RailroadELSGrand Elk RailroadGDLKWatcoGrand Rapids Eastern RailroadGRGenesee & WyomingHuron & Eastern RailwayHESRGenesee & WyomingIndiana Northeastern RailroadINJackson and Lansing RailroadJAILLake State RailwayLSRCLake Superior & Ishpeming RailroadLSILapeer Industrial RailroadLIRRMarquette RailMQTGenesee & WyomingMichigan Shore RailroadMSGenesee & WyomingMichigan Southern RailroadMSOPioneer RailcorpMid-Michigan RailroadMMRRGenesee & WyomingWest Michigan RailroadWMIHamilton Hartford Group

Minnesota RailroadAAR rep. markOwner/LesseeCannon Valley RailroadCVRCProgressive Rail, Inc.Cloquet Terminal RailroadCTRRMinnesota Northern RailroadMNNIndependent Locomotive ServiceMinnesota Prairie LineMPLIMinnesota Valley Regional Railroad Authority Northern Lines RailwayNLRAnacostia and Pacific Company, IncRed River Valley & Western RailroadRRVWMinnesota Valley Regional Railroad AuthorityTwin Cities & Western RailroadTCWMinnesota Valley Regional Railroad Authority

Mississippi RailroadAAR rep. markOwner/LesseeMeridian Southern RailwayMDSMississippian RailwayMSRWMississippi Delta RailroadMDRGulf and Ohio RailwaysMississippi Export RailroadMSEMississippi Southern RailroadMSRVicksburg Southern RailroadVSORWatco

Missouri RailroadAAR rep. markOwner/LesseeArkansas and Missouri RailroadAMColumbia Terminal RailroadCTKansas City Terminal RailwayKCTTerminal Railroad Association of St LouisTRRA

Nebraska RailroadAAR rep. markOwner/LesseeBrandon CorporationBRANFremont and Elkhorn Valley RailroadFEVRKyle RailroadKYLEGenesee & WyomingNebraska Central RailroadNCRC Rio Grande Pacific CorporationNebraska Kansas Colorado RailwayNKC OmniTRAXNebraska Northeastern RailwayNENENebraska Northwestern RailroadNNWOmaha, Lincoln and Beatrice RailwayOLBSidney and Lowe RailroadSLGG Progress Rail

New Hampshire RailroadAAR rep. markOwner/LesseeMilford-Bennington RailroadMBRXNew Hampshire Central RailroadNHCR

New Jersey RailroadAAR rep. markOwner/LesseeBelvidere and Delaware River RailwayBDRV Chesapeake and Delaware, LLCBlack River & Western RailroadBRW Chesapeake and Delaware, LLCCape May Seashore LinesCMSLDover and Delaware River RailroadDD Chesapeake and Delaware, LLCDover & Rockaway River RailroadDRRV Chesapeake and Delaware, LLCMorristown & Erie RailwayMESMS Rail LinesSLRSSouthern Railroad of New JerseySRNJWinchester & Western RailroadWW OmniTRAX

New Mexico RailroadAAR rep. markOwner/LesseeArizona Eastern RailwayAZER Genesee & WyomingSanta Fe Southern RailwaySFSSouthwestern RailroadSW Jaguar Transport HoldingsTexas-New Mexico RailroadTNMR Watco

New York RailroadAAR rep. markArcade & Attica RailroadARAB&H Rail CorporationBHBatten Kill RailroadBKRRBuffalo Southern RailroadBSRRDepew, Lancaster and Western RailroadDLWR Genesee Valley TransportationFalls Road RailroadFRR Genesee Valley TransportationFinger Lakes RailwayFGLKIthaca Central RailroadITHR WatcoLivonia, Avon and Lakeville RailroadLALNew York & Atlantic RailwayNYAOntario Central RailroadONCTOntario Midland RailroadOMIDRochester & Southern RailroadRSR Genesee & WyomingWestern New York and Pennsylvania RailroadWNYP

North Carolina RailroadAAR rep. markOwner/LesseeAberdeen & Rockfish RailroadARAberdeen, Carolina and Western RailwayACWRAlexander RailroadARCAtlantic & Western RailwayATW Genesee & WyomingCaldwell County RailroadCWCYCarolina Central RailwayCarolina Coastal RailwayCLNA Regional RailGreat Smoky Mountains RailroadGSMRWinston-Salem Southbound RailwayWSSYadkin Valley RailroadYVRR Gulf and Ohio Railways

North Dakota RailroadAAR rep. markOwner/LesseeDakota, Missouri Valley & Western RailroadDMVWDakota Northern RailroadDNIndependent Locomotive ServiceMohall Central RailroadNorthern Plains RailroadNPRRed River Valley & Western RailroadRRVWRutland LineYellowstone Valley RailroadYSVRWatco

Ohio RailroadAAR rep. markAshland RailwayASRYCamp Chase RailwayCAMY Gulf & Atlantic RailwaysCincinnati East Terminal RailwayCET Regional RailCuyahoga Valley Scenic RailroadCVSRNapoleon, Defiance & Western RailroadND&W Patriot Rail CompanyOhio Central RailroadOHCR Genesee & WyomingOhio South Central RailroadOSCROhio Terminal RailwayOHIO Carload ExpressOhio Valley RailroadOVR, OVRXToledo Lake Erie & WesternTLEW

Oklahoma RailroadAAR rep. markOwner/LesseeArkansas Southern RailroadARS WatcoBlackwell Northern Gateway RailroadBNGFarmrailFMRCKiamichi RailroadKRR Genesee & WyomingNorthwestern Oklahoma RailroadNOKRSand Springs RailwaySS OmniTRAXStillwater Central RailroadSLWC Watco Texas, Oklahoma and Eastern RailroadTOE Patriot Rail CompanyWichita, Tillman and Jackson RailwayWTJR Rio Grande Pacific Corporation

Oregon