Cactus Plain is a plain east of the Colorado River and Parker Valley, in La Paz County, western Arizona, United States.

Cactus Plain is a landform within the Lower Colorado River Valley. It is adjacent to Bouse Wash, which is on the south. The wash drains northwest-west into the Colorado River.

Recreation activities in both protected areas includes backpacking, day hiking, sightseeing, horseback riding, photography, and botanical and wildlife study.

The 59,100 acres (23,900 ha) Cactus Plain Wilderness Study Area protects the western two-thirds of the Cactus Plain, managed by the Bureau of Land Management (BLM). It is 15 miles (24 km) southeast of Parker, and 3 miles (4.8 km) north of Bouse.

The wilderness study area is an immense open area of stabilized and semi-stabilized sand dunes, unique in western Arizona. Recreation activities include backpacking, day hiking, sightseeing, horseback riding, and botanical and wildlife study.

The 14,630 acres (5,920 ha) East Cactus Plain Wilderness area protects the eastern third of the Cactus Plain, managed by the BLM. It is 10 miles (16 km) 3 miles (4.8 km) north of Bouse.

It is predominantly a complex crescent dune, with dense dune–scrub vegetation, known only from this area in Arizona. The plant community is unique in its denseness and flora species diversity.

• List of LCRV Wilderness Areas (Colorado River)
• Protected areas of La Paz County, Arizona

• Bureau of Land Management – BLM: Cactus Plain Wilderness Study Area
• Wilderness.net: East Cactus Plain Wilderness

34°02′49″N 114°04′48″W / 34.047°N 114.080°W / 34.047; -114.080