Aromas is a census-designated place in Monterey County, and San Benito County, California, United States. 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. Aromas is one of four CDPs in California that are divided between two or more counties. The others are Kingvale, Kirkwood, and Tahoma.