Nam Định is a province in the southern part of the Red River Delta region of northern Vietnam. It borders Ninh Bình province to the southwest, Hà Nam province to the northwest, Thái Bình province to the northeast, and the Gulf of Tonkin to the southeast. As of 2018, it is the 52nd largest province by area and the 12th most populous province of Vietnam.

Xuân Trường is a rural district of Nam Định province in the Red River Delta region of Vietnam. As of 2003 the district had a population of 179,765. The district covers an area of 113 km2. The district capital lies at Xuân Trường town.