Frogner Manor is a manor house and former estate in today's borough of Frogner in Oslo, Norway. The estate comprised most of the modern borough of Frogner, which has been named after the estate, and Frognerseteren with parts of the Nordmarka forest (Frognerseterskogen). The remaining part of the estate is now the site of the Frogner Park, with the manor house found in the south of the park and the Vigeland installation in the park's centre. The 18th century buildings on the grounds now house the Oslo City Museum.

Frogner is a residential and retail borough in the West End of Oslo, Norway, with a population of 59,269 as of 2020. In addition to the original Frogner, the borough incorporates Bygdøy, Uranienborg and Majorstuen. The borough is named after Frogner Manor, and includes Frogner Park. The borough has the highest real estate prices in Norway.