Aromas is a census-designated place (CDP) in Monterey County, and San Benito County, California, United States. 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 about two miles (3 km) to the North. The population was 2,650 at the 2010 census, and 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 at the 2000 census (1,427 in Monterey County and 1,370 in San Benito County). Aromas is one of two CDPs in California that is divided between two or more counties with the other being Kingvale, divided between Placer County and Nevada County.
Aromas is located at 36°53′13″N 121°38′29″W / 36.88694°N 121.64139°W / 36.88694; -121.64139 (36.886988, -121.641396). According to the United States Census Bureau, the CDP has a total area of 4.747 square miles (12.294 km²). 4.736 square miles (12.267 km²) of it is land and 0.011 square miles (0.027 km²) or 0.22% is water.
The 2010 United States Census reported that Aromas had a population of 2,650. The population density was 558.3 people per square mile (215.6/km²). The racial makeup of Aromas was 1,987 (75.0%) White, 16 (0.6%) African American, 37 (1.4%) Native American, 49 (1.8%) Asian, 4 (0.2%) Pacific Islander, 401 (15.1%) from other races, and 156 (5.9%) from two or more races. Hispanic or Latino of any race were 924 persons (34.9%).