Muddy River may refer to:

Streams

Muddy River (Massachusetts) The Muddy River is a series of brooks and ponds that runs through sections of Boston's Emerald Necklace, including along the south boundary of Brookline, Massachusetts (a town that went by the name of Muddy River Hamlet before it was incorporated i ...

, a series of brooks and ponds that runs through sections of Boston's Emerald Necklace *

Muddy River (Merrymeeting Bay) The Muddy River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed June 30, 2011 river in Topsham, Maine, which empties into Merrymeeting Bay. The river is known to be very muddy. See ...

, a river in Maine *

Muddy River (Nevada) The Muddy River, formerly known as the Moapa River, is a short river located in Clark County, in southern Nevada, United States. It is in the Mojave Desert, approximately north of Las Vegas. Geography The Muddy River is approximately long. ...

, a river in Nevada *

Muddy River (Sebago Lake) The Muddy River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed June 30, 2011 tributary of Sebago Lake in the U.S. state of Maine. See also *List of rivers of Maine A ''list'' is ...

, a river in Maine *

Muddy River (Washington) The Muddy River is a stream, about long, southeast of Mount St. Helens in the U.S. state of Washington. The Muddy River flows south–southeast and joins the Lewis River just above the Swift Reservoir. The Lewis River flows west and is a tr ...

, a river in the state of Washington

Other

* ''Muddy River'' (film), a 1981 Japanese film