The 2017–18 Plunket Shield was the 89th season of the Plunket Shield, the domestic first-class cricket competition in New Zealand.
The competition started on 23 October 2017 and finished on 5 April 2018.
[3] The round eight fixture between Canterbury and Auckland at the Mainpower Oval in Rangiora was called off due to an unsafe pitch.
[4] The umpires abandoned the game after only three balls were bowled on day three of the match.
[5] Central Districts won the tournament, following the final round of fixtures, after their nearest rivals, Wellington, failed to win their last match.