| Place Name | Great Valley |
| Place Type | Town |
| ZIP Code(s) | 14741 |
| County | Cattaraugus County |
| Area Code(s) | 716 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 1,850 |
| Majority Ethnicity | White 99.61% |
| Metro/Micro Stats Area | Olean, NY |
| US Congressional District(s) | New York 23rd |
| State Assembly Districts | 148 |
| State Senate Districts | 57 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.61% |
| African American | 0.17% |
| Hispanic | 0% |
| Asian | 0.22% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |