Rail may refer to:

• Rail tracks
• The rolled steel profiles used on rail tracks, see also rail profile and railway rail
• third rail
• Rail transport
• Rail (magazine), a railroad-related periodical.
• Rail (theater), rail in theatrical lighting
• Rail (electronics), rail in electronics
• Rallidae, the group of birds called rails
• Common rail, a fuel injection system
• Crayon Rails, the Mayfair Games board games
• A guard rail for safety or support
• Ruby on Rails is a web framework for the Ruby programming language
• Rail drinks, a term used for alcoholic drinks made using the establishment's default (normally non-premium) liquor
• Handrail on a stairway
• A horizontal outside member on a door or in a frame and panel construction.