| Place Name | Mongaup Valley |
| Place Type | Census Designated Place |
| ZIP Code(s) | 12762 |
| County | Sullivan County |
| Area Code(s) | 845 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 689 |
| Majority Ethnicity | White 44.32% |
| US Congressional District(s) | New York 19th |
| State Assembly Districts | 100 |
| State Senate Districts | 42 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 44.32% |
| African American | 15.63% |
| Hispanic | 0% |
| Asian | 34.94% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.11% |