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