1946 – Harrington has been a harness racing town since a group of enthusiasts held a 60-day fairground meet in 1946.

1947 – The group formed an association called “The Harrington Raceway” and built the present-day track.

1964 – The racing association began planning to renovate the facility to match the weather to give a comfortable environment for the spectators during the colder autumn months when the racing meet was held.

1966 – Plans were formalized to construct a new track to the south of the existing facility. However, the high cost canceled the plan. Instead, a $1-million project was undertaken to build an enclosed clubhouse to enhance the grandstand and improve the heating.

1967 – Along with the improvements, the track’s name was changed from the Kent and Sussex Raceway to Harrington Raceway.

1968 – The construction was completed.

1994 – Delaware legalized slot machines at the horse tracks to save the racing industry. 

1995 – The majority of the fair board of Directors voted to build a slot parlor in March 1995.

1996 – Harrington’s slot machine parlor, Midway Slots, and Racebook opened on August 20, 1996.

2003 – The track was widened, and the turns were enhanced to become gentler, making it safer and more attractive to horse riders.

2006 – A $50-million expansion and renovation of the slot parlor commenced. 

2007 – As part of the project, the Midway Slots name was dropped, and the entire property became known as Harrington Raceway & Casino. Full House also ceded day-to-day operations of the gaming facility to Harrington.

2008 – The expansion was completed by adding a new restaurant, lounge, coffee shop, high-stakes gaming areas, an expanded buffet, and increasing the number of slot machines in the casino from approximately 1,600 to 2,100.

2010 – Table games were added following their legalization earlier in the year.

2011 – The management agreement expired, leaving Harrington Raceway full control of the casino.

2022 – Due to technical difficulties, the racino closed on December 27, 2022. But reopened in the same year – December 31, 2022.