Frogner Park is a public park in the central West End borough of Frogner in Oslo, Norway. The park is historically part of Frogner Manor and is Oslo's largest park, open to the public at all times. It includes the manor house which is the seat of Oslo Museum, the nearby Henriette Wegner Pavilion, the Vigeland installation of sculptures created by sculptor Gustav Vigeland, Frogner Baths, Frogner stadion, Frognerparken Café, the restaurant Herregårdskroen and the largest collection of roses in the country with 14,000 plants of 150 species. Frogner Park is the most visited tourist attraction in Norway.

Oslo is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of 709,037 in 2022, while the city's greater urban area had a population of 1,064,235 in 2022, and the metropolitan area had an estimated population of 1,546,706 in 2021.