The 2019–20 Welsh League Cup (known for sponsorship purposes as The Nathaniel MG Cup) was the 28th season of the Welsh League cup competition, which was established in 1992. Played under a regionalised, knock-out format, the competition is the sixth to be held since the tournament was expanded to include clubs from outside the Cymru Premier. As well as the 12 Cymru Premier clubs from the previous season, every team from the Cymru North and the Cymru South and the wildcard Berriew from the Mid Wales Football League entered. The Premier league teams and the two sides relegated from the top flight, plus the 2nd and 3rd placed teams in each respective Tier 2 league have a bye into the Second Round.