| Official Name: | Youngsville, New York |
| Pushpin Map: | New York#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Sullivan |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1197 |
| Coordinates: | 41.8083°N -74.8864°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 12791 |
| Area Code: | 845 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 971862 |
Youngsville is a hamlet in Sullivan County, New York, United States. The community is located in the Town of Callicoon along New York State Route 52, west of Liberty. Youngsville has a post office with ZIP code 12791, which opened on March 10, 1851.[1] [2]