| Teradomari | |
| 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: | 58.16 |
| Population Total: | 11,766 |
| Population As Of: | 2003 |
| Timezone1: | JST |
| Utc Offset1: | +09:00 |
| Blank Name Sec1: | City hall address |
was a town located in Santō District, Niigata Prefecture, Japan.
As of 2003, the town had an estimated population of 11,766 and a density of 202.30 persons per km2. The total area was 58.16 km2.
On January 1, 2006, Teradomari, along with the city of Tochio, the town of Yoita, and the village of Washima (all from Santō District), was merged into the expanded city of Nagaoka.[1] [2]
In addition to this line, Echigo Kotsu Nagaoka Line had been operated in the town until 1975.