Admir Kalender (born 12 January 2001) is a Croatian tennis player.

Kalender has a career high ATP singles ranking of 966 achieved on 28 August 2023.

He also has a career high ATP doubles ranking of 572 achieved on 21 March 2022.

[1] Kalender made his ATP main draw debut at the 2021 Croatia Open Umag after receiving a wildcard into the doubles main draw.

[2] This biographical article relating to Croatian tennis is a stub.