The Laguna Mountains are a small, approximately circular mountain range of extreme southwest Arizona northeast of Yuma and east of Winterhaven, California on the Colorado River.

Only the north and northeast of the range is not bordered by a river basin; the north contains a small drainage west to the Colorado and Mittry Lake, and borders the south of the Yuma Proving Grounds.

It is on the northeast of the Gila Valley, a Gila River valley, slightly east of the Laguna's and starting at the northern end of the Gila Mountains, and the valley containing northeast Yuma, and the agriculture fields that are north and northeast of the Yuma Mesa.

The due north-trending section of U.S. Route 95 begins at the southeast of the mountain range; the road exits the northeast of the Gila Valley to begin its northern stretch towards Quartzsite, Arizona, about 90 mi.

The high point of the range is Boot Peak, at 1,080 feet (329 m).