High Line or Highline may refer to:

• High Line (New York City), planted pedestrian walkway along former elevated freight rail spur in the Chelsea neighborhood of Manhattan
• High Line (Philadelphia), Pennsylvania Railroad elevated line
• Highline, California, former town
• Hi-Line, area of northern Montana
• Highline High School, public high school in Burien, Washington
• Highline Community College, community college in Des Moines, Washington
• Hi-Line, 1999 movie
• Highlining, type of slacklining

High Line may also refer:

• Picket line, way to tie up a horse
• A Ruby (programming language) development tool

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