| Name | Hamilton County |
| State | Indiana |
| FIPS Code | 18057 |
| County Seat | Noblesville |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 276,098 |
| Population Growth Rate(2000-2022) | 26.55% |
| Majority Ethnicity | White 88.62% |
| Public School Majority Ethnicity | White 72% |
| Partisan Voting Index | Republican:+4 |
| Unemployment Rate (May 2025) | 2.6% |
| Area Code(s) | 317 / 463 / 765 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 88.62% |
| African American | 4.34% |
| Hispanic | 0.08% |
| Asian | 6.87% |
| Native American | 0.04% |
| Hawaiin/Pacific Islander | 0.04% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 72.43% |
| African American | 5.93% |
| Hispanic | 7.84% |
| Asian | 8.49% |
| Native American | 0.19% |
| Hawaiin/Pacific Islander | 0.1% |