North Line may refer to:
- Far North Line, Scotland
- Gjøvik Line, Norway
- Main North Line, New Zealand
- Main North railway line, New South Wales, Australia
- Milwaukee District/North Line, Illinois, United States
- Northern line (underground railway), London, England
- North Line, Chennai Suburban, India
- North Line (METRORail), Houston, Texas, United States
- North-Link Line, Taiwan
- Nordbanen, Denmark
- Sounder North Line, Washington, United States
- Union Pacific/North Line, Illinois, United States
- West North Line, Chennai Suburban, India