Hà Ngọc Diễm (born December 22, 1994) is a retired Vietnamese volleyball player. She is a former member of Vietnam women's volleyball team. At 2014 VTV International Women's Volleyball Cup, she won her first title representing for national team. In 2015, Ha Ngoc Diem plays for VTV Bình Điền Long An, with captain Nguyễn Thị Ngọc Hoa to help the team win the 1st place at , defeat Thông tin Liên Việt Post Bank 3-2 in final. Diễm played on loan with VTV Bình Điền Long An the 2015/16 season and the 2017, on loan with Thông tin Liên Việt Post Bank.