The Salt River Pima–Maricopa Indian Community comprises two distinct Native American tribes—the Pima (Akimel O'odham) and the Maricopa (Piipaash)—many of whom were originally of the Halchidhoma (Xalchidom) tribe. The community was officially created by an Executive Order of US President Rutherford B. Hayes on June 14, 1879. The community area includes 53,600 acres (217 km²) of which 19,000 remain a natural preserve.