Theodore II Lascaris was Byzantine emperor, in exile in the Empire of Nicaea, from 1254 to 1258.

He is chiefly known for two brilliant campaigns by which he recovered Thrace from the Bulgarians (1255-1256). His ill-health and early death prevented his making full use of his ability as a ruler.

Preceded by:
John III
Byzantine emperors
(Empire of Nicaea)
Followed by:
John IV