Gregory Robert Hay (born 14 July 1984 in Rotorua) is a New Zealand cricketer who plays for the Central Districts and for Nelson in the Hawke Cup competition.
After scoring 98 on first-class debut, he went on to continue scoring runs for the Stags, scoring 55 on List A debut.
He was the leading run-scorer in the 2017–18 Plunket Shield season for Central Districts, with 786 runs in nine matches.
In June 2018, he was awarded a contract with Central Districts for the 2018–19 season.
He was also the leading run-scorer for Central Districts in the 2018–19 Ford Trophy, with 351 runs in eight matches.