The community of Aguanga lies near the intersection of State Route 79 (SR 79) and State Route 371 (Cahuilla Road), along the historic Butterfield Overland Mail stage route. The area lies at about above mean sea level (AMSL) and is north of the Cleveland National Forest. The straight-line distance to Palomar Observatory is south, and the observatory site is about higher than the community. The town is also home to Cottonwood Elementary School (K–8) operated by the Hemet Valley Unified School District. The largest nearby city is Temecula, along the Interstate 15 corridor, about west of Aguanga on SR 79.