The Jacumba Mountains are a mountain range of the Peninsular Ranges in eastern San Diego County, California, near the Mexico–United States border.

The range reaches an elevation of 4,512 feet (1,375 m) at Jacumba Peak, near the southern end of the chain.

[2] The range lies in a northwest-southeasterly direction, east of the In-Ko-Pah Mountains, and north of Interstate 8.

The range is approximately 11.5 miles (18.5 km) long, and Table Mountain at the southeast end of the range is located about 3 miles (4.8 km) northeast of the town of Jacumba.

The Volcanic Hills area lies on the northeast flank of the range.