Demir Demirev (Bulgarian: Демир Демирев, born 31 August 1984) is a Bulgarian weightlifter.

He participated in the men's -69 kg class at the 2006 World Weightlifting Championships and won the bronze medal, finishing behind Vencelas Dabaya and Shi Zhiyong.

[1] At the 2007 World Weightlifting Championships he won the bronze medal in the 69 kg category with a total of 334 kg.

[2] Demirev tested positive for a steroid in 2008 during an out-of-competition test, along with ten other weightlifters and therefore Bulgaria's weightlifting federation withdrew its team from the 2008 Summer Olympics in Beijing, China.

This biographical article relating to weightlifting in Bulgaria is a stub.