The 2018 Women's Twenty20 Asia Cup was the seventh edition of the ACC Women's Asia Cup, organized by the Asian Cricket Council (ACC). It took place between 3 and 10 June 2018 in Malaysia, and was the third edition played as a 20-over tournament. The tournament was contested between Bangladesh, India, Malaysia, Pakistan, Sri Lanka and Thailand. India were the defending champions.

The Bangladesh women's national cricket team is the team that represents the country of Bangladesh in international women's cricket matches. They made their international debut when they played, and won, two matches against Thailand in July 2007 before participating in and winning the 2007 ACC Women's Tournament. Bangladesh were granted One-Day International (ODI) status in 2011 after finishing fifth in the 2011 Women's Cricket World Cup Qualifier. They subsequently qualified for the 2014 ICC Women's World Twenty20 as hosts, making their first appearance at a top-level women's international tournament. They have also won the 2018 edition of ACC Women's Asia Cup. This was the only instance in ACC Women's Asia Cup where any team other than India won the tournament. However, they finished fifth in the next edition of Women's Asia Cup, but has since went on to become one of the most competitive women's cricket teams in Asia. The team made its first World Cup appearance at the 2022 Women's Cricket World Cup, and has participated in every edition of the World Twenty20 since making its debut at the 2014 edition.