| Population | 1 (2010), see rank |
| House Units | 1, see rank |
| Race | Whites:0%, Hispanics:100%, Blacks:0%, Asians:0%, Others:100% |
| Total Area: | 0.61 sq mi |
| Water Area: | 0.00 sq mi (0.00%) |
| State: | Illinois |
| Area: | Effingham, IL |
| County: | Effingham County |
| City: | Mason |
| Census Tract: | 950400 |
| Census Block Group: | 950400-2 |