| Tochio | |
| Native Name Lang: | ja |
| Settlement Type: | Former municipality |
| Pushpin Map Caption: | Location in Japan |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Hokuriku |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Niigata Prefecture |
| Subdivision Type3: | District |
| Extinct Title: | Merged |
| Extinct Date: | January 1, 2006 (now part of Nagaoka) |
| Leader Title: | Mayor |
| Leader Title1: | Vice Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 204.92 |
| Population Total: | 23,855 |
| Population As Of: | 2003 |
| Timezone1: | JST |
| Utc Offset1: | +09:00 |
| Blank Name Sec1: | City hall address |
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.[1] [2]
Echigo Kotsu Tochio Line had been operated in the city until 1973.