Fitzwilliam Square is a Georgian garden square in the south of central Dublin, Ireland. It was the last of the five Georgian squares in Dublin to be built, and is the smallest. The middle of the square is composed of a private park, which for more than 200 years has been accessible only to keyholders, mostly the residents and owners of the 69 houses on the square, some of whom pay almost €1,000 a year for the privilege. Fitzwilliam Square East makes up part of Dublin's Georgian mile.