The Childs River, also known as Child's River, is a 5.1 miles (8.2 km) river near Falmouth, Massachusetts

Falmouth, Massachusetts

Falmouth is a town in Barnstable County, Massachusetts, United States; Barnstable County is coextensive with Cape Cod. The population was 31,531 at the 2010 census....

 on Cape Cod

Cape Cod

Cape Cod, often referred to locally as simply the Cape, is a cape in the easternmost portion of the state of Massachusetts, in the Northeastern United States...

. Its drainage area is about 1 square miles (2.6 km²). It has been heavily impacted by the development of cranberry bogs in its upper reaches.

The river arises from John's Pond in Mashpee

Mashpee, Massachusetts

Mashpee is a town in Barnstable County, Massachusetts, United States. The population was 14,006 as of 2010.For geographic and demographic information on specific parts of the town of Mashpee, please see the articles on Mashpee Neck, Monomoscoy Island, New Seabury, Popponesset, Popponesset Island,...

, just north of today's Route 28, and empties into Waquoit Bay

Waquoit Bay

Waquoit Bay is a small landlocked tidal bay on the south shore of Cape Cod in the US state of Massachusetts. The bay is connected with Nantucket Sound and separates the towns of Mashpee and Falmouth.In the early 1960s Norwegian researcher Johannes Kr...

. It runs parallel to the Quashnet River

Quashnet River

The Quashnet River, also known as Quoshnet River or Moonakis River, is a estuary in Falmouth, Massachusetts on Cape Cod. Its area is about ....

.