Janek Joost (born June 19, 1977 in Pärnu) is an Estonian actor.

He has studied at Pärnu 2nd Secondary School and Pärnu Raeküla School. He graduated from evening school in Pärnu (now Pärnu Adult High School). While studying at night school, he worked at Paikseraradio and attended the Aare Laanemetsa theater studio. In 2000, he graduated from the Higher Performing Arts School of the Estonian Academy of Music. In 2007, he defended his master's degree with the thesis "The importance of the voice in creating a role".

In the years 2000-2005, he worked as an actor at the Vanemuise Theater, then he worked as a freelance actor and played mainly at Tartu Uus Teater.