[5] Butterfield Overland Mail established a station 1.7 miles to the west of the current post office in 1858.

Col. Joseph R. West, mentioned the abandoned station location was then called Giftaler’s Ranch, after its German owner Joseph Giftaler, in a journal of his unit's march to Fort Yuma on the old Butterfield Overland Mail route.

[12] Today the station site is on the Twin Creek Stage Stop Ranch, on Allmouth Road, found just east of the Stagecoach Inn at 43851 Highway 79.

The ruins of the old wooden station building and ranch house is located among a grove of trees, at the foot of the west end of the hill at the bottom of the meadow, along the right fork of Allmouth Road.

[13] On September 7, 2020, deputies with the Riverside County Sheriff's Department responded to reports of an assault with a deadly weapon at a residence along Route 371.

Upon responding, they found a woman suffering gunshot wounds, who eventually died from her injuries after being rushed to a hospital.

[16][17] In 2024, new details came out, no suspects were captured, but police believe the robbery was committed by gang members of Laotian descent, and the motive was drug competition/robbery related, because 1,000 pounds and hundreds of plants of weed were on the property, which is 1-5 million dollars worth of drugs, and the victims were recent immigrants from Laos.

[19] According to the United States Census Bureau, the CDP covers an area of 13.6 square miles (35.2 km2), all of it land.

The area lies at about 1,940 feet (590 m) above mean sea level (AMSL) and is north of the Cleveland National Forest.

The largest nearby city is Temecula, along the Interstate 15 corridor, about 17 miles (27 km) west of Aguanga on SR 79.

This area is in a canyon beside Temecula Creek near Pechanga tribal lands and the San Diego County line.

According to the 2010 United States Census, Aguanga had a median household income of $49,618, with 8.5% of the population living below the federal poverty line.