The Royal St. George Yacht Club (RSGYC) is a long-established sailing club situated on the waterfront in Dún Laoghaire Harbour, County Dublin.

Founded in 1838, it occupies a Victorian-style clubhouse dating from 1843, designed as a miniature classical Palladian Villa and faithfully preserved through extensions and rebuilding following a 1919 fire.

The club maintains extensive on-water facilities, including a floating dock, dry-sailing forecourt, dry dock, and crane lift capacity. It hosts national and international sailing events each season and runs learn-to-sail programmes for juniors and adults.

Through its Dún Laoghaire Sailability programme, the club also offers people with physical or sensory impairments the opportunity to participate in sailing during the summer months.