| Fowler River | |
| 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: | County |
| Subdivision Name3: | Grafton |
| Subdivision Type4: | Towns |
| Subdivision Name4: | Alexandria, Bristol |
| Length: | 6.1miles |
| Source1: | Confluence of Clark Brook and Brock Brook |
| Source1 Location: | Alexandria |
| Source1 Coordinates: | 43.6456°N -71.8319°W |
| Source1 Elevation: | 810feet |
| Mouth: | Newfound Lake |
| Mouth Location: | Bristol |
| Mouth Coordinates: | 43.6392°N -71.7725°W |
| Mouth Elevation: | 588feet |
| Tributaries Right: | Town Brook, Bog Brook |
The Fowler River is a 6.1adj=midNaNadj=mid[1] river located in central New Hampshire in the United States. It is an inflow to Newfound Lake, part of the Pemigewasset and Merrimack River watersheds. Below Bog Brook, the Fowler River is subject to the New Hampshire Comprehensive Shoreland Protection Act.
The primary tributary of the river is Clark Brook, which rises south of Mount Cardigan in the town of Alexandria and drops over Welton Falls. Chesley Brook joins from the north, at which point the stream valley widens and begins to support small agricultural operations. The brook's name changes to "Fowler River" when Brock Brook joins from the right at the first crossing of Fowler River Road. The river flows southeast to a junction with Bog Brook, where it turns north and flows one mile to Newfound Lake.