Jacumba Hot Springs (/həˈkuːmbə/ hə-KOOM-bə) is an unincorporated community in the Mountain Empire area of southeastern San Diego County, California, United States.

15 Kumeyaay and one White died in an event connected to alleged cattle rustling during the Jacumba Massacre of February 27, 1880.

[4][5] Around the turn of the 20th century, the health and relaxation benefits of natural hot springs began to be commercialized.

The Jacumba hot spring is prolific and delivered enough water to fill large public baths, the remains of which can still be seen.

Many of the foremost movie stars and celebrities of the time regarded Jacumba as a prime destination for relaxation.

[5] After the new Interstate 8 bypassed Jacumba by two miles, most of the roadside service businesses folded and the community went into economic decline.

The great public baths closed, the swimming pool was filled in, and the well was capped by its rights-owner.

However, the area continues to attract primarily foreign visitors and the motel has acquired rights to the spring and opened a spa.

The United States Border Patrol maintains an increased presence in the area to curtail smuggling and illegal immigration.

[9] According to the United States Census Bureau, the CDP covers an area of 6.1 square miles (15.9 km2), 99.88% of it land, and 0.12% of it water.

Near Jacumba is the former site of the Mountain Springs Station; California Historical Landmark number 568 reads: San Diego MTS route 888 provides service on Mondays and Fridays between El Cajon and Jacumba Hot Springs.