John Richard Lill CBE (born 17 March 1944 in London) is a British classical pianist.
Lill studied at the Royal College of Music with Angus Morrison, and with Wilhelm Kempff.
He has also performed in the United States with the Symphony Orchestras of Cleveland, New York, Philadelphia, Dallas, Seattle, Baltimore, Boston, Washington, D.C., and San Diego.
His repertoire includes more than seventy concertos, and he is acclaimed in particular as a leading interpreter of Beethoven, whose complete sonata cycle he has performed on several occasions in the UK, US and Japan.
Lill has recorded for Deutsche Grammophon, EMI (Complete Beethoven Piano Concertos with RSNO and Alexander Gibson), ASV (both Brahms Concertos with the Hallé and James Loughran), Tchaikovsky l with the LSO and James Judd, plus the complete Beethoven Sonatas.