| Official Name: | Greenfield Park, 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: | Ulster |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 873 |
| Coordinates: | 41.7258°N -74.4858°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 12435 |
| Area Code: | 845 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 951747 |
Greenfield Park is a hamlet in Ulster County, New York, United States. The community is located along New York State Route 52, west of Ellenville. Greenfield Park has a post office with ZIP code 12435, which opened on December 23, 1852.[1] [2]