The 1780 English cricket season was the ninth in which matches have been awarded retrospective first-class cricket status.
The scorecards of four first-class matches have survived.
Four first-class match scorecards survive from 1780, two of them matches between England sides and Hampshire XIs and two between sides organised by John Sackville, 3rd Duke of Dorset and Horatio Mann.
[7] Duke & Son of Penshurst made the first six-seam cricket ball during the year.
[8][9] Duke & Son of Penshurst made the first six-seam cricket ball and it was presented to the Prince of Wales.