Kaja Kallas is an Estonian politician. She is currently a Member of the European Parliament elected from Estonia and belongs to the Group of the Alliance of Liberals and Democrats for Europe (ALDE). She has previously worked as an attorney-at-law and been a Member of the Parliament of Estonia (Riigikogu), where she chaired the Econimics Affairs Committee. She is also a Vice-Chairman of the Estonian Reform Party. As an attorney, she specialised in the European and Estonian competition law.

Kallas works on the Digital Single Market strategy, energy and consumer policies, as well as on the relations with Ukraine. 

In 2014, Kaja Kallas was elected to the European Parliament.