The Cactus Plain is a plain east of Parker, Arizona and the Parker Valley within the Lower Colorado River Valley.
The Cactus Plain is adjacent to the Bouse Wash on the south, which drains northwest-west into the Colorado River. The Cactus Plain contains the East Cactus Plain Wilderness, one of about 25 wilderness areas located in the Lower Colorado River Valley region south from Lake Mead and Hoover Dam.