The Chichibu Railway 800 series (秩父鉄道800系) was an electric multiple unit (EMU) train type for local services operated by Chichibu Railway in Japan from 1979 to 1990.

[1] Cars DeHa 806 and KuHa 856 were used as sources of spare parts and were scrapped without entering service.

[1] Nine 2-car trains were converted in 1979 from former Odakyu 1800 series commuter EMUs.

The trains were replaced by 1000 series EMUs from 1989 and withdrawn by 1990.

[1] As of December 2018, DeHa 801 remains at a farmhouse near Mount Akagi, Shibukawa city, Gunma.