Sonja Kailassaari (b. 1980) is a Finnish television presenter.

Kailassaari has hosted, among other things, Subtv's pop and rock music and film magazine program "Sessions", Yle TV2's music program "Musiikki-tv" and Yle Fem's morning program "Min Morgon". Since August 2014, Kailassaari has hosted the "Efter Nio" discussion program with Mårten Svartström. In addition, she is the leader of the panel in the program "Vem vad när". Kailassaari has been dating Aku Hirviniemi since March 2018 and they got engaged on February 2, 2020.