Size Comparison: Thailand, Vietnam, and Cambodia
Thailand is the largest of the three mainland Southeast Asian nations by land area.
| Country | Area (km²) | Area (mi²) | Rank (World) |
|---|
| Thailand | 513,120 | 198,117 | 50th |
| Vietnam | 331,699 | 128,070 | 66th |
| Cambodia | 181,035 | 69,898 | 88th |
Relative Sizes
- Thailand ≈ 1.55× Vietnam ≈ 2.83× Cambodia.
- Vietnam ≈ 1.83× Cambodia.
Geographic Notes
- Thailand: Compact "axe" shape; central Chao Phraya basin, Khorat Plateau (NE), Malay Peninsula (S).
- Vietnam: Elongated "S" (1,650 km N–S); Red River Delta (N), Annamite Range (W), Mekong Delta (S).
- Cambodia: Low-lying Tonlé Sap/Mekong basin; Cardamom/Dâmrei Mts (SW).
Population Contrast (2023)
- Vietnam: ~100M (dense, 302/km²)
- Thailand: ~71M (138/km²)
- Cambodia: ~17M (94/km²)
Vietnam packs the most people into the smallest area; Thailand has the most land and resources.
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