Joshua Tree is located in the Mojave Desert at 34°8′N 116°19′W.
According to the United States Census Bureau, the CDP has a total all land area of 95.9 km² (37.0 mi²). Joshua Tree, California is home to Joshua Tree National Park. Joshua Tree shares the border to its east with Twentynine Palms, California, its western border with Yucca Valley, California, its northwestern border with Landers, California, and its southern border is Coachella Valley, California.