Harrington Raceway & Casino is a harness racing track and casino (a "racino") located on the fairgrounds of the Delaware State Fair, just south of. Read more. Harrington Raceway & Casino is one of the most beloved gambling casinos in Delaware. Harrington Raceway & Casino is a harness racing track and casino located on the fairgrounds of the Delaware State Fair, just south of Harrington, Delaware. Get details about Harrington Raceway & Casino in our Kent County and explore attractions, places to stay, dining, events, music and more with Visit Delaware. Harrington, DE Directions · () Call Now · Known For. Map · S Dupont Hwy. We sincerely appreciate your business and wish you better luck in the future. . Other · From the Business. This Kent County, Delaware casino has delectable dining options, live. Hours · Known For. Other. Specialties. Harrington, DE Directions · () Call Now · More Info. Here at your favorite Delaware casino, we offer shuttle services, catering, sports betting, and Live On Stage featuring Delaware's best complimentary live. Please know that all games are regulated by the Delaware State Lottery. Midway Slots & Simulcast · Map · 15 W Rider Rd. Harrington Raceway & Casino · Page · Casino · () · [HOST] The Harrington Casino is where winners play! Enjoy over hot playing slot machines, dine in an award winning restaurants, make a bet on a profootball.