It was originally a field hockey and tennis club for past and present pupils of Alexandra College.

Initially the subscription fee was two shillings and six pence and only Alexandra College pupils were allowed to join.

[8][9][10] After several seasons outside the national league, Old Alex gained promotion in 2018 after defeating Dublin University 2–1 in a promotion/relegation playoff.

On 2 March 1896 the club hosted the first ever women's international field hockey match when Ireland defeated England 2–0.

[2][16] When the Ireland women's national field hockey team won the silver medal at the 2018 Women's Hockey World Cup, the squad included two former Old Alex players – Emily Beatty and Shirley McCay.