| Official Name: | Frankclay, Missouri |
| Settlement Type: | Census-Designated Place |
| Pushpin Map: | Missouri |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Missouri |
| Subdivision Type2: | County |
| Subdivision Name2: | St. Francois County |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.64 |
| Area Land Km2: | 1.64 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.63 |
| Area Land Sq Mi: | 0.63 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 194 |
| Population Density Km2: | 118.50 |
| Population Density Sq Mi: | 306.96 |
| Elevation Ft: | 886 |
| Postal Code Type: | ZIP code |
| Postal Code: | 63601[2] |
| Area Code: | 573 |
| Blank Name: | FIPS code |
| Blank Info: | 29-25516 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2587070 |
Frankclay is an unincorporated community and census-designated place in West Central St. Francois County, Missouri, United States. It is located approximately one mile south of Route 8 about five miles west of Flat River.
A post office called Frankclay was established in 1905, and remained in operation until 1973.[3] The community has the name of the original owner of the town site.[4]