| Place Name | Mason City |
| Place Type | City |
| ZIP Code(s) | 50401 |
| County | Cerro Gordo County |
| Area Code(s) | 641 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 28,012 |
| Population Growth Rate (2010-19) | -2.64% |
| Majority Ethnicity | White 89.46% |
| Metro/Micro Stats Area | Mason City, IA |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 52,53 |
| State Senate Districts | 26,27 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 89.46% |
| African American | 3.01% |
| Hispanic | 0.42% |
| Asian | 0.77% |
| Native American | 0.3% |
| Hawaiin/Pacific Islander | 6.05% |