Kazusa-Ushiku Station (上総牛久駅, Kazusa-Ushiku-eki) is a railway station operated by the Kominato Railway Company's Kominato Line, located in Ichihara, Chiba Prefecture, Japan.

It is 16.4 kilometers from the western terminus of the Kominato Line at Goi Station.

Kazusa-Ushiku Station was opened on March 7, 1925.

The platforms are connected by a level crossing.

The wooden station building dates from the 1925 construction, and is one of the few stations on the Kominato line which is permanently attended.