The 1930–31 Plunket Shield season was a tournament of the Plunket Shield, the domestic first-class cricket competition of New Zealand.
Canterbury won the championship, finishing at the top of the points table at the end of the round-robin tournament between the four first-class sides, Auckland, Canterbury, Otago and Wellington.
Table Below are the Plunket Shield standings for the season: TeamPlayedWonLostDrawnPointsNetRpWCanterbury 3 3 0 0 24 9.193Auckland 3 2 1 0 16 5.838Wellington 3 1 2 0 8 -1.733Otago 3 0 3 0 0 -12.263
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