Nin-kisalsi (; ) was a Sumerian ruler of the Mesopotamian city of Adab in the mid-3rd millennium BC.
His name does not appear in the Sumerian King List, but he is known from one inscription bearing his name. The inscription, on a bowl fragment, reads:
<br> me-silim lugal kisz e2-sar bur mu-gi4 nin-KISAL-si ensix(GAR.PA.TE.SI) adab<br> "Me-silim, king of Kish, to the Esar temple sent over (this) bowl (for the burgi ritual). Nin-KISALsi, (was) the governor of Adab." |Inscription of Mesilim mentioning Nin-Kisalsi
It appears from this inscription that King Mesilim of Kish was a contemporary with Nin-kisalsi and probably his suzerain. Another such ruler is Lugalshaengur, Governor of Lagash, who also appears in inscriptions as a vassal of Mesilim.