| Toi | |
| Native Name Lang: | ja |
| Settlement Type: | Former municipality |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | Location in Japan |
| Coordinates: | 34.9108°N 138.7923°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Chūbu (Tōkai) |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Shizuoka Prefecture |
| Subdivision Type3: | District |
| Subdivision Name3: | Tagata |
| Extinct Title: | Merged |
| Extinct Date: | April 1, 2004 (now part of Izu) |
| Leader Title: | Mayor |
| Leader Title1: | Vice Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 49.41 |
| Population Total: | 5,203 |
| Population As Of: | March 1, 2004 |
| Population Density Km2: | 105 |
| Timezone1: | JST |
| Utc Offset1: | +09:00 |
| Blank Name Sec1: | City hall address |
is a town located in Tagata District, Shizuoka Prefecture, Japan on the west coast of Izu Peninsula facing Suruga Bay.
As of March 1, 2004, final population data before the amalgamation, the town had an estimated population of 5,203 and a density of 105 persons per km2.
On April 1, 2004, Toi, along with the towns of Amagiyugashima, Nakaizu and Shuzenji (all from Tagata District), was merged to create the city of Izu.
Toi was also home to the Toi gold mine, the second most productive gold mine in Japan after Sado, Niigata. The total area was 49.41 km2. It was the location of the world's largest flower clock.