Koide (小出町, Koide-machi) was a town located in Kitauonuma District, Niigata Prefecture, Japan.

On November 1, 2004, Koide, along with the town of Horinouchi, and the villages of Hirokami, Irihirose, Sumon and Yunotani (all from Kitauonuma District), was merged to create the city of Uonuma.

[1][2] Koide has a humid subtropical climate (Köppen Cfa) that borders on a humid continental climate, with four distinct seasons.

Winters are cool and extremely snowy due to its location in a mountainous valley, while summers are hot and humid.

This Niigata Prefecture location article is a stub.