Kay Kirsten Evert Smits (born 31 March 1997) is a Dutch handball player for SG Flensburg-Handewitt and the Dutch national team.

He is the first ever men's player of the Netherlands to win the EHF Champions League, Europe's most important club competition with SC Magdeburg in 2022/2023.

Smits had to withdraw for the 2024 EHF Euro's due to inflammation of his heart muscle.

[1][2] Although Kay Smits is still an active player, he is already considered as the best Dutch right back ever.

His father Gino Smits [nl], sister Inger and brother Jorn are also international handball players for the Netherlands.