Long Đạt was born in 1984. Long Đạt's father is Đào and his mother is Kiêm Huê Nguyễn. His paternal grandfather is Mai and his paternal grandmother was Nguyệt Nguyễn thị. He has two brothers and a sister, named Long-Giang, Long-Thành and Thủy-Tiên. He is the youngest of the four children.