Tochio, Niigata

Tochio (栃尾市, Tochio-shi) was a city located in Niigata Prefecture, Japan. The city was founded on June 1, 1954.

As of 2003, the city had an estimated population of 23,855 and the density of 116.41 persons per km². The total area was 204.92 km².

On January 1, 2006, Tochio, along with the towns of Teradomari and Yoita, and the village of Washima (all from Santō District), was merged into the expanded city of Nagaoka.