| Little Suncook 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: | Merrimack |
| Subdivision Type4: | Town |
| Subdivision Name4: | Epsom |
| Length: | 4miles |
| Source1: | Northwood Lake |
| Source1 Location: | Epsom |
| Source1 Coordinates: | 43.2197°N -71.2906°W |
| Source1 Elevation: | 517feet |
| Mouth: | Suncook River |
| Mouth Location: | Epsom |
| Mouth Coordinates: | 43.2236°N -71.3553°W |
| Mouth Elevation: | 325feet |
| Tributaries Left: | Little Bear Brook, Blake Brook |
| Tributaries Right: | Gulf Brook, Lockes Brook |
The Little Suncook River is a 4adj=midNaNadj=mid[1] river in central New Hampshire in the United States. It is a tributary of the Suncook River, part of the Merrimack River (and therefore Gulf of Maine) watershed.
The Little Suncook begins at the outlet of Northwood Lake in the town of Epsom. Flowing west, it passes through Bixby Pond (also known as Cass Pond), passes the villages of Epsom and Gossville, and joins the Suncook River near the Epsom Traffic Circle.
U.S. Route 4 parallels the Little Suncook for the river's entire length.