Magnus Ilmjärv (born 31 August 1961 in Viljandi) is an Estonian historian.

He graduated from the University of Tartu cum laude in 1988 and defended his MA thesis in 1997.

He specializes in Baltic history and international relations between two World Wars.

His most notable work is arguably the Silent Submission, which covers the loss of independence of the three Baltic states.

In Estonia, he is probably best known for his harsh criticism on the Estonian leadership in 1940, incl.