Leinster group (disambiguation)

Leinster group may refer to:
 * Leinster group, in mathematics, a group-theoretic analogue of the perfect numbers
 * Leinster group, a group of moraines and other remains of ancient glaciation of Mount Leinster in Ireland
 * The Leinster group of Nickel deposits, mined near Leinster, Western Australia
 * Several province-based groupings of Irish sport:
 * The Leinster Group of the 1925–26 National Football League (Ireland)
 * The Leinster group stage of the 2015 All-Ireland Senior Hurling Championship
 * The Leinster group stage of the 2016 All-Ireland Senior Ladies' Football Championship