| Place Name | Middletown |
| Place Type | Census Designated Place |
| ZIP Code(s) | 95461 |
| County | Lake County |
| Area Code(s) | 707 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 1,580 |
| Population Growth Rate (2010-19) | -15.80% |
| Majority Ethnicity | White 62.84% |
| Metro/Micro Stats Area | Clearlake, CA |
| US Congressional District(s) | California 5th |
| State Assembly Districts | 4 |
| State Senate Districts | 2 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 62.84% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 37.16% |