| Place Name | Westhaven-Moonstone |
| Place Type | Census Designated Place |
| ZIP Code(s) | 95570 |
| County | Humboldt County |
| Area Code(s) | 707 |
| Timezone | Pacific Standard Time (PST) |
| Population (2022) | 938 |
| Population Growth Rate (2010-19) | -1.49% |
| Majority Ethnicity | White 92.85% |
| Metro/Micro Stats Area | Eureka-Arcata, CA |
| US Congressional District(s) | California 2nd |
| State Assembly Districts | 2 |
| State Senate Districts | 2 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.85% |
| African American | 0% |
| Hispanic | 1.19% |
| Asian | 0.4% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.56% |