It is a highland border district located in the southeastern of Lang Son province, bordering Loc Binh district to the northwest, the People's Republic of China to the northeast with the 51.2 km border line, Quang Ninh province to the southeast, Bac Giang province to the southwest. Dinh Lap district has 12 affiliated administrative units, including two townships, namely Dinh Lap Township and Thai Binh Farm Township and ten communes.

The district has an area of ​​1,187 km² with the population of 28,579 people in 2019, including Tay, Nung, Kinh, Dao, San Chi ethnic groups.

Website:  https://dinhlap.langson.gov.vn/