An Óige was founded on 7 May 1931 by an organising committee which included Thekla Beere, Shane Bodkin, and Chalmers (Terry) Trench.
Around the year 1990, the organisation bought the former convent school and orphanage complex at 60-61 Mountjoy Street, built circa 1865, and remodelled it for use as a hostel.
[4] In May 2019, An Óige closed the Dublin International Youth Hostel, which was then its main/headquarters facility and reportedly accounted for 60% of its revenue at the time.
[6] In October 2019 the site of the former Headquarters on Mountjoy Street was put on the market at a guide price of €5 million.
These include to support a "love and appreciation of the countryside" by providing "simple hostel accommodation for [people] whilst on their travels", to foster an appreciation of Irish culture and heritage, to co-operate with Irish organisations which seek to preserve the countryside and walking routes, and to foster associations with similar organisations in other countries.