The North Nashua River is a river in northern Massachusetts.

It rises from the Whitman River and Phillips Brook in Fitchburg, Massachusetts.

It flows 19.9 miles (32.0 km), generally southeastward, past Fitchburg and joins the South Nashua River, about 5 miles (8.0 km) below its issuance from the Wachusett Reservoir, to form the Nashua River.

[1] The river supplies over two million people with drinking water.

[2] http://www.nashuariverwatershed.org/