| Place Name | Port Costa |
| Place Type | Census Designated Place |
| ZIP Code(s) | 94569 |
| County | Contra Costa County |
| Area Code(s) | 341,510 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 361 |
| Population Growth Rate (2010-19) | 0.00% |
| Majority Ethnicity | White 87.45% |
| Metro/Micro Stats Area | San Francisco-Oakland-Berkeley, CA |
| US Congressional District(s) | California 5th |
| State Assembly Districts | 14 |
| State Senate Districts | 3 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 87.45% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 12.55% |