| Nakaizu | |
| Native Name Lang: | ja |
| Settlement Type: | Former municipality |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | Location in Japan |
| Coordinates: | 34.949°N 138.999°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: | 102.02 |
| Population Total: | 8,457 |
| Population As Of: | March 1, 2005 |
| Population Density Km2: | 77 |
| Timezone1: | JST |
| Utc Offset1: | +09:00 |
| Blank Name Sec1: | City hall address |
was a town located in Tagata District, Shizuoka Prefecture, Japan, in central Izu Peninsula.
As of March 1, 2004, final population data before the amalgamation, the town had an estimated population of 8,457 and a density of 77.03 persons per km2. The total area was 110.02 km2.
On April 1, 2004, Nakaizu, along with the towns of Amagiyugashima, Shuzenji and Toi (all from Tagata District), was merged to create the city of Izu.
Nakaizu, located in the Izu-Kogen highlands of central Izu Peninsula was noted for its production of wasabi and shiitake.