Aromas is a census-designated place (CDP) in Monterey County, and San Benito County, California. The population was 2,650 at the 2010 census.
The CDP straddles the border of the two counties, with Monterey County to the west and San Benito County to the east. The Santa Cruz County line is less than a mile to the northwest, and Santa Clara County is about two miles to the north. Its population was almost equally distributed between the two counties with 1,358 in Monterey County and 1,292 in San Benito County; this was down from a population of 2,797 during the 2000 census (1,427 in Monterey County and 1,370 in San Benito County).
Aromas is one of four CDPs in California that are divided between two or more counties. The others are Kingvale (divided between Placer County and Nevada County), Kirkwood (divided between Alpine County and Amador County), and Tahoma (divided between Placer County and El Dorado County).
The town was originally known as Sand Cut, named from the Southern Pacific Railroad tunnel constructed nearby in the 1870s. The town's name later changed to Vega. In 1918, the community changed its name to Aromas. Aromas has been noted for its unusual place name.