Robert Lijesen (born February 5, 1985 in Dordrecht) is a Dutch Swimmer, who is specialized in the 50 and 100 m freestyle.
He is currently trained by former world champion Marcel Wouda at the same club as multiple olympic champion Pieter van den Hoogenband.
He holds the European record in the 4 × 100 m freestyle Short Course together with Bas van Velthoven, Mitja Zastrow and Robin van Aggele in 3:09.18 swum during the World SC Championships 2008 in Manchester they finished second in this event behind the United States who swum a world record in the same race.