Kampuchea-Krom literally means “the lower land of Kampuchea.” “Krom” in Khmer also means “below” to indicate “Southern” part of Cambodia. Kampuchea-Krom was the southernmost territory of the Khmer Empire, and was once known as Cochinchina (French). It covers an area of 67,700 km2 with Cambodia to the North, the Gulf of Thailand to the West, the South China Sea to the South and the Champa’s territory to the Northeast. Today, Kampuchea-Krom is the south-western part of Vietnam, known in Vietnamese as Tây Nam Bộ.
The Vietnamese authorities changed all the locality names of villages, districts, cities, and provinces from Khmer to Vietnamese. The same thing is being done today in Cambodia. For example, “Phnom Penh” is called “Nam Vang” by the Vietnamese.
Kampuchea-Krom originally consists of four provinces DON NAI, LONG HOR, MOTH CHROUK and PEAM, later on divided into 21 provinces and 1 Port: Kompong Krobey (Bến Nghé). Kampuchea-Krom also has two big islands: Koh Trol (Phú Quốc) and Koh Trolach (Côn Sơn).
There are two long rivers in Kampuchea-Krom: the Mekong river (Sông Tiền) and Bassac river (Sông Hậu). The approximately length of each river ranges from 200-250 km. These two rivers bring lots of silts for the Mekong Delta.
Map of Kampuchea-Krom
Names of Provinces, Port and Islands in Kampuchea-Krom
| Khmer Name | Vietnamese Name | |
| Provinces | ខេត្ត – Khet | Tỉnh |
| 1 | ព្រៃនគរ -Prey Nokor | Sài Gòn |
| 2 | ទួលតាមោក – Toul Tamoak | Thủ Dầu Một |
| 3 | ចង្វាត្រពាំង – Chongva Tropeang | Biên Hòa |
| 4 | ព្រះសួគ៌ា – Preah Suorkea | Bà Rịa |
| 5 | អូកាប់ – O-Kab | Vũng Tàu |
| 6 | រោងដំរី – Raung Domrei | Tây Ninh |
| 7 | កំពង់គោ – Kampong Kou | Long An |
| 8 | មេស – Me Sor | Mỹ Tho |
| 9 | កោះគង Koh Kaung | Gò Công |
| 10 | កំពង់ឫស្សី – Kampong Russey | Bến Tre |
| 11 | លង់ហោរ – Long Hor | Long Hồ |
| 12 | ផ្សារដែក – Phsa Dek | Sa Đéc |
| 13 | ព្រះត្រពាំង – Preah Trapeang | Trà Vinh |
| 14 | ព្រែកឫស្សី – Prek Russey | Cần Thơ |
| 15 | បារ៉ាជ – Barach | Long Xuyên |
| 16 | មាត់ជ្រូក – Moth Chrouk | Châu Đốc |
| 17 | ពាម – Peam | Hà Tiên |
| 18 | ក្រមួនស – Kramoun Sor | Rạch Giá |
| 19 | ឃ្លាំង – Khleang | Sóc Trăng |
| 20 | ពលលាវ – Pol Leav | Bạc Liêu |
| 21 | ទឹកខ្មៅ – Teuk Khmau | Cà Mau |
| Port | កំពង់ផែ – Kompong Pe | Cảng |
| 1 | កំពង់ក្របី – Kampong Krobey | Bến Nghé |
| Islands | កោះ – Koh | Đảo |
| 1 | កោះត្រឡាច – Koh Tralach | Côn Sơn |
| 2 | កោះត្រល់ – Koh Trol | Phú Quốc |
