1980 County Championship

• 12 points for a win
• 6 points to each team for a tie
• 6 points to team still batting in a match in which scores finish level
• Bonus points awarded in first 100 overs of first innings
  • Batting: 150 runs - 1 point, 200 runs - 2 points 250 runs - 3 points, 300 runs - 4 points
  • Bowling: 3-4 wickets - 1 point, 5-6 wickets - 2 points 7-8 wickets - 3 points, 9-10 wickets - 4 points
• No bonus points awarded in a match starting with less than 8 hours' play remaining.
• The two first innings limited to a total of 200 overs. The team batting first limited to 100 overs. Any overs up to 100 not used by the team batting first could be added to the overs of the team batting second.
• Position determined by points gained. If equal, then decided on most wins.
• Each team plays 22 matches.

Four matches were abandoned without a ball being bowled and are not included in the table.^[2] The Championship was sponsored by Schweppes for the third time.