The place of South Dennis is located in the county of Barnstable. It covers a total area of 12.3 sq. km. Businesses related to airport transportation, supplies of artist materials, auto dealership of used and new cars, auto painting and repair, supplies of auto parts, auto transmission, beverages, car financing and loans, household cleaning, computer renting and leasing, data processing services and supplies of electronic equipments, enhance the financial viability of the city. Commercial spaces are utilized by garden centers and farmers market.