Long line or longline may refer to:
Long Line, an album by Peter Wolf Long line (topology), or Alexandroff line, a topological space Long line (telecommunications), a transmission line in a long-distance communications network Longline fishing, a commercial fishing technique AT&T Long Lines, a telecommunications network AT&T Long Lines Building, now known as 33 Thomas Street, a building in New York City Aerial crane or longline, a transport method Peripherally inserted central catheter, a medical device