Sergiy[a] Olehovych Kyslytsya (Ukrainian: Сергій Олегович Кислиця, romanized: Serhii Olehovych Kyslytsia; born 15 August 1969) is a Ukrainian career diplomat, who serves as Ambassador Extraordinary and Plenipotentiary of Ukraine and Permanent Representative of Ukraine to the United Nations.

Kyslytsya graduated cum laude from Taras Shevchenko National University of Kyiv with a Master of Arts degree in International Law.

In 2021, Kyslytsya was awarded the Order of Merit of the III degree: his citation read "for significant personal contribution to strengthening international cooperation of Ukraine, many years of fruitful diplomatic activity and high professionalism.

"[13]On December 21, 2024, Kyslytsya dismissed from the position during diplomatic sector rotations carried out by President Zelenskyy.

[20] A draft resolution submitted by the United States and Albania condemning Russian aggression ultimately failed due to Russia's veto.

[21] On 28 February, during a special session of the United Nations General Assembly, Kyslytsya said "‘If [Putin] wants to kill himself, he doesn’t need to use the nuclear arsenal.