Alaa Binrajab (born 22 September 2004) is a Bahraini swimmer. In 2018, she competed in the women's 50 metre freestyle and women's 100 metre freestyle events at the 2018 FINA World Swimming Championships (25 m) held in Hangzhou, China. In both events she did not advance to compete in the semi-finals. In 2019, she represented Bahrain at the 2019 World Aquatics Championships held in Gwangju, South Korea. She competed in the women's 50 metre freestyle and women's 100 metre freestyle events. In both events she did not advance to compete in the semi-finals.