| Yamauchi | |
| Native Name Lang: | ja |
| Settlement Type: | Former municipality |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | Location in Japan |
| Coordinates: | 33.1833°N 186°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kyushu |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Saga Prefecture |
| Subdivision Type3: | District |
| Subdivision Name3: | Kishima |
| Extinct Title: | Merged |
| Extinct Date: | March 1, 2006 (now part of Takeo) |
| Leader Title: | Mayor |
| Leader Title1: | Vice Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 40.91 |
| Population Total: | 9,745 |
| Population As Of: | November 30, 2004 |
| Population Density Km2: | 238.21 |
| Timezone1: | JST |
| Utc Offset1: | +09:00 |
| Blank Name Sec1: | City hall address |
| Website: | Takeo City |
was a town located in Kishima District, Saga Prefecture, Japan.
On March 1, 2006, Yamauchi, along with the town of Kitagata (also from Kishima District), was merged into the expanded city of Takeo.
Mt. Kurokami, Mt. Jinroku
