Wimbourne House (also known as Wimborne House or the William Kent House) is a historic townhouse at 22 Arlington Street in St James's, a district of the City of Westminster in central London, England. Designed in the Neo-Palladian style by William Kent, it was built between 1743 and 1754, being completed after the architect's death. It is a Grade II* listed building, and the west front overlooks Green Park. The building now houses special event rooms for the adjacent Ritz Hotel.