Lars Onsager (1903 nî 11 goe̍h 27 ji̍t – 1976 nî 10 goe̍h 5 ji̍t) sī chi̍t ūi Bí-kok ê hòa-ha̍k-ka. I mā-sī 1968 nî Nobel Hòa-ha̍k Chióng ê ti̍t-chióng-jîn; i ti̍t-chióng ê lí-iû sī for the discovery of the reciprocal relations bearing his name, which are fundamental for the thermodynamics of irreversible processes.

Lars Onsager