| Place Name | St. Johns (Maricopa County) |
| Place Type | Census Designated Place |
| ZIP Code(s) | 85339 |
| County | Maricopa County |
| Area Code(s) | 520 |
| Timezone | Mountain Standard Time (MST) |
| Population (2022) | 195 |
| Population Growth Rate (2010-19) | 44.96% |
| Majority Ethnicity | Native American 0% |
| Metro/Micro Stats Area | Phoenix-Mesa-Chandler, AZ |
| US Congressional District(s) | Arizona 1st |
| State House Districts | 27 |
| State Senate Districts | 27 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 0% |
| African American | 2.21% |
| Hispanic | 79.46% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 18.33% |