The Keikyu 1000 series (京急1000形) was a DC electric multiple unit (EMU) train type formerly operated by the private railway operator Keikyu on commuter services in the Tokyo area of Japan from 1959 until June 2010.

The last train made its final run in service on the Daishi Line on 28 June 2010.

[1] The 1000 series fleet consisted of two-, four-, six-, and eight-car sets.

[2] Beginning in 1995, when the line speed between Shinagawa and Yokohama was raised to 120 km/h (75 mph), the 1000 series fleet was relegated from limited express services as, in spite of the sets' 120 km/h design speed, they were limited to only 110 km/h (68 mph) in service.

[2] Two 1000 series cars, 1351 and 1356, remain stored at Keikyu's Kurihama Works.