Marble Rock, Iowa — Population by Race
Population by Race
Breakdown of the population of Marble Rock, Iowa by race. Sourced from the U.S. Census Bureau's American Community Survey.
Population by Race
| Race | Population | Percent |
|---|---|---|
| White | 278 | 96.2% |
| Black | 0 | 0.0% |
| Hispanic | 0 | 0.0% |
| Asian | 0 | 0.0% |
| Other | 11 | 3.8% |