| Place Name | Marrowstone |
| Place Type | Census Designated Place |
| ZIP Code(s) | 98358 |
| County | Jefferson County |
| Area Code(s) | 360 |
| Timezone | Pacific Standard Time (PST) |
| Population (2022) | 965 |
| Population Growth Rate (2010-19) | 17.89% |
| Majority Ethnicity | White 99.35% |
| US Congressional District(s) | Washington 6th |
| State House Districts | 24 |
| State Senate Districts | 24 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.35% |
| African American | 0% |
| Hispanic | 0.65% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |