| Place Name | Mason |
| Place Type | City |
| ZIP Code(s) | 45040 |
| County | Warren County |
| Area Code(s) | 283,513 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 30,659 |
| Population Growth Rate (2010-19) | 13.28% |
| Majority Ethnicity | White 77.51% |
| Metro/Micro Stats Area | Cincinnati, OH-KY-IN |
| US Congressional District(s) | Ohio 1st |
| State House Districts | 54 |
| State Senate Districts | 7 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 77.51% |
| African American | 4.76% |
| Hispanic | 0.04% |
| Asian | 14.04% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.64% |