Nackawic is a former town in New Brunswick, Canada. It held town status prior to 2023 and is now part of the rural community of Nackawic-Millville. It is approximately 65 km west of the city of Fredericton on the east bank of the Saint John River. Nackawic, from the Malecite Nelgwaweegek, "straight stream", possibly in reference to how the mouth faces the Saint-John River.