Shimo-Igusa Station (下井草駅, Shimo-Igusa-eki) is a railway station on the Seibu Shinjuku Line in Suginami, Tokyo, Japan, operated by the private railway operator Seibu Railway.

Shimo-Igusa Station Station is served by the 47.5 km Seibu Shinjuku Line from Seibu-Shinjuku in Tokyo to Hon-Kawagoe in Saitama Prefecture, with some through services to and from Haijima on the Seibu Haijima Line.

The station consists of two ground-level side platforms serving two tracks.

[2] In fiscal 2013, the station was the 45th busiest on the Seibu network with an average of 23,764 passengers daily.

[3] The passenger figures for previous years are as shown below.