| West Platner Brook | |
| Pushpin Map: | New York |
| Pushpin Map Caption: | Location of the mouth of West Platner Brook |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New York |
| Subdivision Type4: | County |
| Subdivision Name4: | Delaware |
| Source1 Coordinates: | 42.3081°N -75.0429°W |
| Mouth: | Platner Brook |
| Mouth Coordinates: | 42.2554°N -74.9763°W[1] |
| Mouth Elevation: | 1421feet |
West Platner Brook is a river in Delaware County, New York. It flows into Platner Brook northwest of Fraser.