Thailand vs Vietnam: Population Comparison 2026
Thailand
VietnamVietnam has 30,617,815 more people than Thailand (1.4× as many): 102.2 million vs 71.6 million in 2026. Median age is 41.0 in Thailand and 33.9 in Vietnam; fertility is 1.19 vs 1.86 children per woman.
Thailand
2026- Median age
- 41.0
- Fertility (TFR)
- 1.19
- Working age (15–64)
- 69.2%
- Trend
- Declining (-0.08%)
Vietnam
2026- Median age
- 33.9
- Fertility (TFR)
- 1.86
- Working age (15–64)
- 67.7%
- Trend
- Growing (+0.57%)
Population pyramids, 2026
Total Population
Thailand
71.6M
Vietnam
102.2M
Youth (0-14)
Thailand
14.1%
Vietnam
22.4%
Elderly (65+)
Thailand
16.7%
Vietnam
9.9%
Where the two pyramids differ
The pyramids are overlaid so you can read the difference by age and sex: the longer bar in each band marks the country with more people of that age.
📊 Understanding the Population Difference Chart
This visualization shows where and by how much the populations differ between Thailand and Vietnam for each age group, split by gender:
Left Side (Males)
Blue = Thailand has more males
Green = Vietnam has more males
Right Side (Females)
Pink = Thailand has more females
Orange = Vietnam has more females
💡 How to Read: Each age group shows up to 2 bars - one on the left (male difference) and one on the right (female difference). The bar's color tells you which country has more people, and the bar's length shows by how much. For example, if you see a green bar on the left, it means Vietnam has more males in that age group.
Notable Differences (>20% variance):
Demographic comparison, 2026
| Indicator | Thailand | Vietnam | Difference |
|---|---|---|---|
| Population (2026) | 71,559,615 | 102,177,430 | Vietnam has 30.6 million more (1.4×) |
| Change 2025–2026 | -0.1% (Declining) | +0.6% (Growing) | |
| Median age (2026) | 41.0 | 33.9 | Thailand older by 7.1 yrs |
| Total fertility rate | 1.19 — 0.91 below replacement | 1.86 — 0.24 below replacement | |
| Fertility rate, 2030 (UN projection) | 1.20 | 1.82 | |
| Birth rate (per 1,000) | 7.9 | 12.8 | |
| Population 2050 (UN projection) | 66.4 million (-7.2%) | 110.0 million (+7.7%) | |
| Peak population | Peaks 2022 | Peaks 2049 |
Differences by age group, 2026
| Age | Thailand (M / F) | Vietnam (M / F) | Difference |
|---|---|---|---|
| 0-4 | 1505K / 1415K | 3537K / 3208K | Vietnam has 131.0% more people aged 0-4 |
| 5-9 | 1692K / 1593K | 3860K / 3563K | Vietnam has 125.9% more people aged 5-9 |
| 10-14 | 1991K / 1877K | 4473K / 4284K | Vietnam has 126.4% more people aged 10-14 |
| 15-19 | 2158K / 2048K | 3858K / 3751K | Vietnam has 80.9% more people aged 15-19 |
| 20-24 | 2378K / 2281K | 3324K / 3306K | Vietnam has 42.3% more people aged 20-24 |
| 25-29 | 2481K / 2369K | 3169K / 3145K | Vietnam has 30.2% more people aged 25-29 |
| 30-34 | 2545K / 2504K | 3880K / 3898K | Vietnam has 54.0% more people aged 30-34 |
| 35-39 | 2487K / 2485K | 4353K / 4334K | Vietnam has 74.7% more people aged 35-39 |
| 40-44 | 2532K / 2590K | 4100K / 4130K | Vietnam has 60.7% more people aged 40-44 |
| 45-49 | 2564K / 2693K | 3367K / 3472K | Vietnam has 30.1% more people aged 45-49 |
| 50-54 | 2508K / 2749K | 3047K / 3179K | Vietnam has 18.4% more people aged 50-54 |
| 55-59 | 2495K / 2811K | 2706K / 2949K | Vietnam has 6.6% more people aged 55-59 |
| 60-64 | 2265K / 2604K | 2390K / 2771K | Vietnam has 6.0% more people aged 60-64 |
| 65-69 | 1897K / 2243K | 1774K / 2342K | Thailand has 0.6% more people aged 65-69 |
| 70-74 | 1387K / 1742K | 1139K / 1634K | Thailand has 12.8% more people aged 70-74 |
| 75-79 | 920K / 1237K | 623K / 1037K | Thailand has 29.9% more people aged 75-79 |
| 80-84 | 516K / 763K | 270K / 561K | Thailand has 54.1% more people aged 80-84 |
| 85-89 | 289K / 474K | 122K / 349K | Thailand has 62.1% more people aged 85-89 |
| 90-94 | 123K / 228K | 40K / 173K | Thailand has 65.2% more people aged 90-94 |
| 95-99 | 34K / 68K | 6K / 47K | Thailand has 91.5% more people aged 95-99 |
| 100+ | 6K / 12K | 0K / 8K | Thailand has 123.4% more people aged 100+ |
Frequently Asked Questions
Which has more people, Thailand or Vietnam?
Vietnam has more: 102.2 million vs 71.6 million in 2026 — 1.4× as many, 30.6 million more people.
Which country is older?
Thailand, with a median age of 41.0 vs 33.9 in Vietnam (2026).
Which has higher fertility?
Vietnam, at 1.86 children per woman vs 1.19 in Thailand. Replacement is 2.1, so both are below it.
How will Thailand and Vietnam compare in 2050?
By 2050 the UN projects Thailand at 66.4 million (-7.2% from 2026) and Vietnam at 110.0 million (+7.7%).
Are Thailand and Vietnam growing or shrinking?
Thailand is declining (-0.1% in 2026); Vietnam is growing (+0.6%).
