Maiara Regina Pereira Barreto (born 6 July 1987) is a Brazilian Paralympic swimmer who competes in international elite competitions.

She is a double Parapan American Games silver medalist and has competed at the 2016 Summer Paralympics.

Barreto became a paraplegic in 2009 after a motorcycle accident.

[1][2] Barreto is a pharmacist[1] by training and a graduate of the University of São Paulo.

Her capstone project assessed adverse effects of vancomycin use in a hospital setting.