Dalquharran Castle is a category A listed building in South Ayrshire, Scotland, designed by Robert Adam and completed around 1790.

One recent report states, "This property [completed in 1790] should not be confused with the ruined Old Dalquharran Castle which stands nearby".

A round bastion turret in the south front contains a drawing room on the ground floor, with library above, with views over Girvan Water.

[2] To the north of the castle, Adam designed a long low stable range connected at either end to the main building by screen walls with gateways, creating a forecourt.

The outbuildings were constructed in a simpler style than originally designed by Adam, possible after his death in 1792, with several small lodges arranged symmetrically around the court.

[11] Asquith's daughter, Violet Bonham Carter recorded her impressions of the castle in a diary entry for 5 August 1905: "Oh for Dalquharran with its Raeburns and ruins and long green garden full of clematis!

"[12] The property was sold by the Kennedy family in the 1930s to a timber merchant who leased the castle to the Scottish Youth Hostel Association from 1936 to 1939.

[13] Outline planning permission was granted in 1990 for an ambitious redevelopment, with two golf courses, a hotel, conference centre, country club, and hundreds of holiday homes.

The property was sold to developers in 2001;[3] further permissions were granted in 2004 and then again in 2009 for less ambitious schemes to convert the castle into a hotel.