Lennart Axel Edvard Carleson (born 18 March 1928) is a Swedish mathematician. He is known as a leader in the field of harmonic analysis and for his proof of Lusin's conjecture. He was awarded the Wolf Prize in Mathematics in 1992, the Lomonosov Gold Medal in 2002, the Sylvester Medal in 2003, and the Abel Prize in 2006.