| Place Name | Middleburg |
| Place Type | Census Designated Place |
| ZIP Code(s) | 32068 |
| County | Clay County |
| Area Code(s) | 904 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 12,617 |
| Population Growth Rate (2010-19) | -0.98% |
| Majority Ethnicity | White 90.03% |
| Metro/Micro Stats Area | Jacksonville, FL |
| US Congressional District(s) | Florida 3rd |
| State House Districts | 18,19 |
| State Senate Districts | 5 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 90.03% |
| African American | 3.84% |
| Hispanic | 0.12% |
| Asian | 0.27% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.75% |