Jack Sexton (born 17 May 2001) is a New Zealand rugby union player, who plays for the and . His preferred position is prop.
Sexton was born in Christchurch and attended St Andrew's College, Christchurch where he played rugby for the first XV. He earned selection for the New Zealand Schools side in 2019, before being named in the New Zealand U20 squad in 2021. Having not made the Canterbury side, he moved south to the Southland region, playing his club rugby for Star RFC. He is the son of former Crusader Matt Sexton.
Sexton has represented in the National Provincial Championship since 2023, being named in the squad for the 2025 Bunnings NPC. He was named in the wider training group for the 2026 Super Rugby Pacific season.