The league began in 15 February 2019 and concluded in 25 October 2019.
[3][4] On 23 September, Dundalk won the title after a 3–2 win over Shamrock Rovers.
Each team plays each other four times for 36 matches in the season.
UCD, the 2018 First Division champion, were promoted to the league for the first time since 2014, and Finn Harps, winners of the promotion/relegation playoffs, were promoted to the league, returning after the absence in the previous season.
[7][8] Note: Flags indicate national team as has been defined under FIFA eligibility rules.