Wynyard Park is a small park in the central business district of Sydney, Australia. The space which is now Wynyard Park was originally the parade ground of the first military barracks established shortly after the foundation of Sydney in 1788.

When the Sydney underground railways (now part of the CityRail network) were constructed in 1927, Wynyard railway station was constructed by excavating the park and then rebuilding the park after the station had been constructed. The park is bounded by York Street and Carrington Street.

Wynyard Park is a popular place for office workers to eat lunch. Also, many bus services to the northern suburbs originate their journeys from Wynyard Park.