| Population | 6 (2010), see rank |
| House Units | 2, see rank |
| Race | Whites:100%, Hispanics:0%, Blacks:0%, Asians:0%, Others:0% |
| Total Area: | 0.00 sq mi |
| Water Area: | 0.00 sq mi (0.00%) |
| State: | Iowa |
| Area: | Boone, IA |
| County: | Boone County |
| City: | Madrid |
| Census Tract: | 020500 |
| Census Block Group: | 020500-4 |