Sergio Álvarez (weightlifter)

Sergio Álvarez Boulet (born 11 October 1979) is a Cuban weightlifter.

He represented Cuba at the 2000 Summer Olympics, ranking 5th.

He participated in the men's -56 kg class at the 2006 World Weightlifting Championships and won the silver medal, finishing behind Li Zheng. He snatched 123 kg and clean and jerked an additional 156 kg for a total of 279 kg, only 1 kg behind winner Li.

He twice won the gold medal at the Pan American Games in the 56 kg category.

At the 2008 Summer Olympics he ranked 6th in the 56 kg category, with a total of 272 kg.