The Pawtuckaway River is a 3.6 mile long (5.7 km) river in southeastern New Hampshire in the United States. It is a tributary of the Lamprey River, part of the Great Bay and Piscataqua River watershed leading to the Atlantic Ocean.The river forms the south outlet of Pawtuckaway Lake, a 900-acre (360 ha) lake in the town of Nottingham, New Hampshire.