The Keikyu 600 series (京急600形) is an electric multiple unit (EMU) train type operated by the private railway operator Keikyu on commuter services in the Tokyo area of Japan.

[1] The 600 series is primarily operated on the Keikyu Main Line.

[5] The first batch of sets introduced featured transverse seating bays throughout.

[1] Set 606 received a special "Blue Sky Train" livery in March 2005[7] to commemorate the opening of Haneda Airport Terminal 2.

Modifications included were replacing the wiper cover with a slit of the model number (similar to those found on the 2100 series and N1000 series), narrower front-end skirts, LED side lights, and a pair of LCD information screens above the doorways.