| Official Name: | Sank, Missouri |
| Settlement Type: | unincorporated community |
| Mapsize: | 250x200px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Missouri |
| Subdivision Type2: | County |
| Subdivision Name2: | Bollinger |
| Subdivision Type3: | Township |
| Subdivision Name3: | Liberty |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 397 |
| Coordinates: | 37.1717°N -90.0136°W |
| Postal Code Type: | ZIP code |
| Area Code: | 573 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 741240 |
Sank is an unincorporated community in the south-central part of Liberty Township in Bollinger County, Missouri, United States. The community is accessed via a county road, one mile north of Missouri Route 51. The confluence of Clubb and Hawker creeks lies just to the southwest of the location and the Sank State Wildlife Area is located along the south side of Route 51 and Hawker Creek.[1] Zalma lies four miles to the southwest and Dongola is three miles east. Marble Hill is about nine miles to the north-northeast along Route 51.[2]
Sank's name was bestowed by Jasper Cooper, who owned a store there and had applied for a post office in 1915. In choosing the post office's and community's name, he decided on the name Sank because it was the nickname of a friend and prominent man in the community, "Sank" Fowler.[3] [4] The post office was in operation between 1912–1920, and 1925–1954.[5]