'''Lirr''' or '''LIRR''' may refer to:
*Long Island Rail Road, a commuter railroad on Long Island, New York, United States *Lapeer Industrial Railroad, in Lapeer, Michigan *Leeds Inner Ring Road, a motorway and A-road circling Leeds, West Yorkshire, England *Lirr (Greyhawk), a goddess in the World of Greyhawk campaign setting for the ''Dungeons & Dragons'' roleplaying game
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