Georgios Lassanis (Greek: Γεώργιος Λασσάνης; 1793–1870) was a scholar and politician from Kozani, Greece.

He studied literature and philosophy in Leipzig, then, in 1818, moved to Odessa, where he taught at the Greek community's business school.

Lassanis and Ypsilantis were arrested by Austrian authorities and they were kept in close confinement for seven years in Terezín.

After the establishment of the first Greek state he became general inspector of the army of eastern Greece, and in 1837 he became finance minister.

In his honor, the municipality of Kozani holds a Lassaneia festival every August, with theatre, concerts, athletic events, etc.