Shamsun Nahar, also known as Shamsun Nahar Sr. (born 31 January 2003) is a Bangladeshi women's association football defender who plays as a left-back for Bashundhara Kings Women and the Bangladesh women's national football team. She previously played for the Bangladesh women's national under-17 football team and was twice a member of the winning Bangladesh team in the AFC U-14 Girls' Regional Championship – South and Central, held in Nepal in 2015 and in Tajikistan in 2016. She currently plays football at the Kolsindur High School in Mymensingh as a defender, most recently in the 2017 AFC U-16 Women's Championship.