Maghnia Hammadi (born 22 February 2000) is an Algerian weightlifter. She won the gold medal in her event at the 2017 African Weightlifting Championships held in Vacoas, Mauritius. She won the bronze medal in her event at the 2021 African Weightlifting Championships held in Nairobi, Kenya. She won two medals at the 2022 Mediterranean Games held in Oran, Algeria. She won the silver medal in the women's 71 kg Snatch event and the bronze medal in the women's 71 kg Clean & Jerk event.