Sadayavarman Sundara Pandyan I is king and Lord Emperor of the Pandyan dynasty, ruling regions of Tamilakkam (present day South India between 1250–1268.

Jatavarman Sundara Pandyan I is remembered for his patronage of the arts and Dravidian architecture, paying attention to the refurbishment and decoration of Kovils (the Tamil term for a distinct style of Hindu temple).

He oversees the burgeoning economic growth of the Pandyan kingdom.

On the eve of his death in 1268, the second Pandyan empire's power and territorial extent has risen to its zenith.