Ken Kallaste (né Akerta; born 31 August 1988) is an Estonian professional footballer who plays as a left back for Meistriliiga club Levadia and the Estonia national team.

He made his debut in the Meistriliiga playing for Flora affiliated Warrior on 12 March 2006, in a 0–6 away loss to Maag Tartu.

[3][4] From 8 May 2010 to 20 July 2013, Kallaste played every single minute of 116 consecutive league matches, earning himself the nickname Raudmees (Iron Man).

[5] On 22 December 2015, Kallaste signed for Polish club Górnik Zabrze on a one-and-a-half-year deal, with an option to extend the contract for another year.

[9] On 17 June 2019, Kallaste signed for I liga side GKS Tychy on a one-year deal, with an option to extend his contract for another year.