Cameron Run is a 3.0-mile-long (4.8 km)[1] tributary stream of the Potomac River, located in the U.S. state of Virginia.

The lower course near Eisenhower Avenue is largely channelized and flows just north of the Capital Beltway until it crosses under it near Telegraph Road[2] The lower 1 mile (1.6 km) or so is tidal and was navigable in colonial times.

Cameron Run is part of the Cameron Run Watershed, which encompasses a total of 44 square miles (110 km2) in Northern Virginia (33 square miles (85 km2) in Fairfax County).

Too much sediment from the stream, some of it from the Woodrow Wilson Bridge project (begun in 1999), has reduced the depth of the channel, causing flooding problems.

[4] In November 2012, voters in Fairfax County approved a $30 million bond referendum to fund construction of a levee and pump station to prevent flooding in the Huntington neighborhood adjacent to Cameron Run.