The win was announced at the Fields in Trust Awards Ceremony at Lord’s Cricket Ground in London.
The East Renfrewshire park won the public vote ahead of three other shortlisted local green spaces to take the 2016 title. More than 10,000 votes were cast.
Rouken Glen Park was described in its nomination for the Award as ‘a place for people and nature’. Opened in 1906, visitor numbers last year reached nearly 1,000,000. The park is designated as a Site of Special Scientific Interest, has been awarded Green Flag status and has received investment from Heritage Lottery Fund grants.
Councillor Vincent Waters, East Renfrewshire Council’s convener for environment, said: "Rouken Glen Park is a special place to many people in East Renfrewshire and beyond. It is the heart of the community in Giffnock, and visitor numbers reached nearly 1,000,000 last year.
"The park has a rich diversity of habitats, including gorge, river, meadow, woodland, pond and amenity grassland. It is also a Site of Special Scientific Interest, due to the interesting geology found in the gorge, which dates back 350 million years. It supports a range of wildlife including otter, badger, roe deer and fox, as well as a high number of bird species such as kingfisher, dipper, buzzard and goldcrest.
"Rouken Glen Park is just coming to the end of a £3m project involving the Heritage Lottery Fund which helped to transform and develop a number of areas within the park. Thanks to this project there is a new play park, forest walk, renovated walled garden, improved pond and a refurbished visitor centre."
Rouken Glen Park was one of four parks from across the UK shortlisted for the Award. Castle Gardens in Antrim, Pontypool Park in Torfaen and Preston Park Rockery in Brighton had also been in the running and were named the best park in Northern Ireland, Wales and England respectively at the awards ceremony.
The competition asked members of the public to nominate their favourite parks, with any local green space across the UK eligible, followed by a three week public vote between all those parks nominated.
Rouken Glen Park becomes the second recipient of the UK’s Best Park accolade. Last year Telford Town Park in Shropshire beat 121 other nominated parks.