| Beards Brook | |
| Pushpin Map: | New Hampshire#USA |
| Pushpin Map Size: | 250 px |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | New Hampshire |
| Subdivision Type3: | Counties |
| Subdivision Name3: | Sullivan, Hillsborough |
| Subdivision Type4: | Towns |
| Subdivision Name4: | Washington, Hillsborough |
| Length: | 12.5miles |
| Source1: | Island Pond |
| Source1 Location: | Washington, Sullivan County |
| Source1 Coordinates: | 43.1714°N -72.0592°W |
| Source1 Elevation: | 428order=flipNaNorder=flip |
| Mouth: | North Branch Contoocook River |
| Mouth Location: | Hillsborough, Hillsborough County |
| Mouth Coordinates: | 43.1125°N -71.9247°W |
| Mouth Elevation: | 598feet |
| Tributaries Left: | Woodward Brook |
| Tributaries Right: | Shedd Brook |
Beards Brook or Beard Brook[1] is a 12.5adj=midNaNadj=mid[2] stream located in southern New Hampshire in the United States. It is a tributary of the North Branch of the Contoocook River, part of the Merrimack River watershed.
Beards Brook begins at the outlet of Island Pond in the town of Washington, New Hampshire. The brook descends rapidly northeast to the village of East Washington, then turns south and enters Hillsborough. A significant tributary is Shedd Brook, entering from the west in Hillsborough. Beards Brook joins the North Branch of the Contoocook near Hillsborough village, just upstream of the Contoocook River.