| Population | 78 (2010), see rank |
| House Units | 47, see rank |
| Race | Whites:98.7%, Hispanics:1.3%, Blacks:1.3%, Asians:0%, Others:0% |
| Total Area: | 0.01 sq mi |
| Water Area: | 0.00 sq mi (0.00%) |
| State: | Missouri |
| Area: | St. Louis, MO-IL |
| County: | Jefferson County |
| City: | Byrnes Mill |
| Census Tract: | 700302 |
| Census Block Group: | 700302-2 |