Kawasaki line may refer to:

• Kawasaki Kisen Kaisha (Japanese: 川崎汽船株式会社, romanized: Kawasaki Kisen Kabushiki-gaisha, lit. 'Kawasaki Steam Engine Company') aka K-Line, a private Japanese railroad line and operating company
• Kawasaki Municipal Subway (Japanese: 川崎縦貫高速鉄道, romanized: Kawasaki jūkan kōsoku tetsudō, lit. 'Kawasaki Longitudinal Rapid Railway'), a future subway line in Kawasaki, Kanagwa Prefecture, Japan
• Kawasaki City Tram (Japanese: 川崎市電, romanized: Kawasaki Shiden), a former tram line in Kawasaki, Kanagwa Prefecture, Japan

• Kawasaki Route (Japanese: 川崎線, romanized: Kawasaki-sen) aka Route K6, a toll road of the Shuto expressway system in Greater Tokyo