Mellis Brook is a river in Delaware County in New York. It flows into Wilson Hollow Brook northwest of Downsville.
| Mellis Brook | |
|---|---|
  Location of the mouth of Mellis Brook in New York  Mellis Brook (the United States) | |
| Location | |
| Country | United States |
| State | New York |
| County | Delaware |
| Physical characteristics | |
| Source | |
| • coordinates | 42°06′52″N 75°00′54″W / 42.1144444°N 75.015°W |
| Mouth | Wilson Hollow Brook |
• coordinates | 42°05′51″N 75°00′38″W / 42.0975868°N 75.0104423°W[1] |
• elevation | 1,293 ft (394 m) |