Prince Heinrich Ruzzo Reuss, Count of Plauen (German: Heinrich Ruzzo, Prinz Reuß von Plauen; 24 May 1950 – 29 October 1999), known as Prince Ruzzo Reuss for short, was a Swiss-born Swedish landscape architect and, by tradition, a prince of the formerly sovereign House of Reuss.
His branch ruled the Principality of Reuss-Gera until 1918.
He was married to his second wife, former ABBA singer Anni-Frid Lyngstad until his death, who became Princess Reuss of Plauen following the marriage.