The Keio 6000 series (京王6000系, Keiō 6000-kei) was an electric multiple unit (EMU) train type in Japan, operated by Keio Corporation on its suburban Tokyo commuter rail network between 1972 and 2011.

A four-car formation was used on the Keio Dobutsuen Line as a wanman driver-only-operated shuttle service.

Passenger accommodation consisted of longitudinal bench seating throughout.The first units entered service on 23 May 1972.

The remodeling went as follows: The cars received a new grey livery with red and white diagonal stripes.

[4] The DeWa 600 series was used with ChiKi 290 or KuYa 900 sandwiched between cars 601 and 621.