Royal Danish Yacht Club (Danish: Kongelig Dansk Yachtklub; shortened KDY) is a Danish yacht club in Copenhagen that was established 1866 under the name Dansk Forening for Lystsejlads. It is the oldest yacht club in Denmark, and has been under royal patronage since Christian IX's approval in 1891. It has about 2,200 members. The club house has been situated in Tuborg Havn since 2007.