Signal is a ghost town located on the banks of the Big Sandy River in southern Mohave County, Arizona, United States.

In 1874 the McCracken mines opened up and Signal grew up a couple years later in 1876 to 1877.

The Big Sandy River runs to the east of the town site.

The Arrastra Mountain Wilderness is about three miles south of the town site.

The Artillery Mountains run along the western side of the Big Sandy River to Alamo Lake, 12 miles (19 km) to the south.