Kate Alexandra Heffernan (born 7 October 1999) is a New Zealand netball international and former cricketer.

Her mother, her aunt, Maxine Blomquist, her sister, Georgia Heffernan and a cousin, Shirley Langrope, are all New Zealand netball internationals.

[4][5][6][7] The Heffernan family live on their sheep and beef farm, near Tapanui, West Otago.

[8] The Heffernan sisters attended Tapanui's Blue Mountain College[9] and St Hilda's Collegiate School.

[9] She and Georgia Heffernan also won national titles representing St Hilda's Collegiate School.

[34][35][36][37][38][39] Ahead of the 2018 season, while playing for Netball South, they were also named as training partners for Southern Steel.

She joined Steel as a replacement for an injured Dani Gray and received a contract for the remainder of the season.

[53][54][55] She was subsequently included in the squad for the 2021 Taini Jamison Trophy Series, but didn't get on court.

[19][58] She was included in the 2022 Commonwealth Games squad[59] and, on 30 July 2022, she eventually made her senior debut in New Zealand's opening match against Northern Ireland.

[26][62][63][64] Ahead of the 2024 Netball Nations Cup, Heffernan was named vice-captain to Phoenix Karaka.