| Cao Lộc District | |
| Settlement Type: | District |
| Native Name: | Huyện Cao Lộc |
| Pushpin Map: | Vietnam |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Northeast |
| Subdivision Type2: | Province |
| Subdivision Name2: | Lạng Sơn |
| Seat Type: | Capital |
| Seat: | Cao Lộc |
| Leader Title1: | Chairman of the People's Committee |
| Leader Name1: | Nguyễn Duy Anh |
| Unit Pref: | Imperial |
| Area Total Km2: | 644 |
| Population As Of: | 2019 |
| Population Total: | 79,873[1] |
| Population Density Km2: | 124 |
| Population Urban: | 17,575 |
| Timezone: | Indochina Time |
| Utc Offset: | +7 |
| Coordinates: | 21.9058°N 106.8405°W |
Cao Lộc is a rural district of Lạng Sơn province in the Northeast region of Vietnam. As of 2003, the district had a population of 75,980. The district covers an area of 644 km². The district capital lies at Cao Lộc.
Cao Lộc, Đồng Đăng (site of the border crossing), Tân Thành, Xuân Long, Yên Trạch, Tân Liên, Gia Cát, Cống Sơn, Mẫu Sơn, Xuất Lễ, Cao Lâu, Hải Yến, Lộc Yên, Thanh Lòa, Hòa Cư, Hợp Thành, Thạch Đạn, Bảo Lâm, Thụy Hùng, Song Giáp, Phú Xá, Bình Trung, Hồng Phong.