| Iwafune | |
| Native Name Lang: | ja |
| Settlement Type: | Former municipality |
| Seal Type: | Emblem |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | Location in Japan |
| Coordinates: | 36.3167°N 178°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kantō |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Tochigi Prefecture |
| Subdivision Type3: | District |
| Subdivision Name3: | Shimotsuga |
| Extinct Title: | Merged |
| Extinct Date: | April 5, 2014 (now part of Tochigi) |
| Leader Title: | Mayor |
| Leader Title1: | Vice Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 46.74 |
| Population Total: | 18152 |
| Population As Of: | 2013 |
| Population Density Km2: | auto |
| Timezone1: | JST |
| Utc Offset1: | +09:00 |
| Blank Name Sec1: | City hall address |
was a town located in Shimotsuga District, Tochigi Prefecture, Japan.
As of 2013, the town had an estimated population of 18,152 and a density of persons per km2. The total area was 46.74 km2.[1]
On April 5, 2014, Iwafune was merged into the expanded city of Tochigi.