Julia Beljajeva (born 21 July 1992) is an Estonian right-handed épée fencer.

In the senior category, she was a member of the Estonia team that won the bronze medal in women's team épée at 2012 European Championships in Legnano and the gold medal at the 2013 European Championships in Zagreb.

In the 2013–14 season Beljajeva climbed her first World Cup with a silver medal in the Doha Grand Prix, followed by a quarter-finals placing in Barcelona.

At the World Championships in Kazan she was overcome in the table of 16 by teammate Erika Kirpu, who eventually earned a bronze medal, and could not defend her title.

In the team event, Estonia took their revenge against Italy in the semi-finals, prevailing 42–32, but lost to Russia in the final and ended up with a silver medal.