| Place Name | Camp Pendleton Mainside |
| Place Type | Census Designated Place |
| ZIP Code(s) | 92055 92058 |
| County | San Diego County |
| Area Code(s) | 442,760 |
| Timezone | Pacific Standard Time (PST) |
| Population (2022) | 7,424 |
| Majority Ethnicity | White 60.12% |
| Metro/Micro Stats Area | San Diego-Chula Vista-Carlsbad, CA |
| US Congressional District(s) | California 49th |
| State Assembly Districts | 76 |
| State Senate Districts | 36 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 60.12% |
| African American | 5.26% |
| Hispanic | 0.68% |
| Asian | 3.84% |
| Native American | 0.1% |
| Hawaiin/Pacific Islander | 30% |