| Potton Brook | |
| Subdivision Type1: | Country |
| Subdivision Name1: | England |
| Subdivision Type3: | Unitary Authority |
| Subdivision Name3: | Central Bedfordshire |
| Discharge1 Location: | Sandy |
| Source1 Location: | east of Gamlingay, Cambridgeshire, England |
| Source1 Coordinates: | 52.1514°N -0.161°W |
| Mouth Location: | Bedfordshire, England |
| Mouth Coordinates: | 52.1133°N -0.2769°W |
| Mouth Elevation: | 25m (82feet) |
Potton Brook rises east of Gamlingay, Cambridgeshire, and flows southwest and then south through Potton[1] and the John O'Gaunt Golf Club and into Sutton, Bedfordshire. Potton Brook curves west and northwest, and joins the River Ivel northeast of Lower Caldecote.
Potton Brook flows along the West Boundary of the Henry Smith playing fields in Potton. On West side of the playing fields is the smaller Horse Brook which flows into Potton Brook.