| Former municipality | |
| Since | April 1, 2005 |
| Currently part of | Izunokuni |
Izunagaoka's location in Shizuoka, Japan. |
|
| Location | |
| Country | Japan |
| Region | Chūbu region (Tōkai region) |
| Prefecture | Shizuoka |
| District | Tagata District |
| Physical characteristics | |
| Area | 16.52 km² |
| Population (as of April 1, 2005) | |
| Total | 15,339 |
| Density | 928.5/km² |
| Symbols | |
| Tree | Osmanthus |
| Flower | Iris |
| Bird | Japanese White-eye |
Izunagaoka (伊豆長岡町 Izu-Nagaoka-chō) was a town located in Tagata District, Shizuoka, Japan in northern Izu Peninsula.
Izu-Nagaoka was established on April 1, 1889 as Kawanishi Village. It was renamed Izunagaoka Town on November 3, 1934.
As of March 1, 2005, the town had an estimated population of 15,339 and a density of 928.5 persons per km². The total area was 16.52 km². The town was served by a station on the Izuhakone Railway.
On April 1, 2005 Izunagaoka was merged with the neighboring towns of Ōhito and Nirayama, both from Tagata District, to form the new city of Izunokuni and thus it no longer exists as an independent municipality.