PopulationPyramids
UN World Population Prospects Data Visualized

USA vs Thailand: Population Comparison 2026

The United States has 277,475,879 more people than Thailand (4.9× as many): 349.0 million vs 71.6 million in 2026. Median age is 38.7 in the United States and 41.0 in Thailand; fertility is 1.63 vs 1.19 children per woman.

United States

2026
0
people
Median age
38.7
Fertility (TFR)
1.63
Working age (15–64)
64.3%
Trend
Growing (+0.51%)

Thailand

2026
0
people
Median age
41.0
Fertility (TFR)
1.19
Working age (15–64)
69.2%
Trend
Declining (-0.08%)

Population pyramids, 2026

Total Population

United States

349.0M

vs

Thailand

71.6M

Youth (0-14)

United States

16.9%

vs

Thailand

14.1%

Elderly (65+)

United States

18.8%

vs

Thailand

16.7%

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 United States and Thailand for each age group, split by gender:

Left Side (Males)

Blue = United States has more males

Green = Thailand has more males

Right Side (Females)

Pink = United States has more females

Orange = Thailand 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 Thailand has more males in that age group.

Notable Differences (>20% variance):

Ages 0-4: United States has 538.3% more people
Men: 8.0M more in United States • Women: 7.7M more in United States
United States: 9.5M men, 9.1M women • Thailand: 1.5M men, 1.4M women
Population Ratio
18.6M
2.9M
Ages 5-9: United States has 490.5% more people
Men: 8.2M more in United States • Women: 7.9M more in United States
United States: 9.9M men, 9.5M women • Thailand: 1.7M men, 1.6M women
Population Ratio
19.4M
3.3M
Ages 10-14: United States has 442.0% more people
Men: 8.8M more in United States • Women: 8.3M more in United States
United States: 10.8M men, 10.2M women • Thailand: 2.0M men, 1.9M women
Population Ratio
21.0M
3.9M
Ages 15-19: United States has 439.1% more people
Men: 9.5M more in United States • Women: 9.0M more in United States
United States: 11.7M men, 11.0M women • Thailand: 2.2M men, 2.0M women
Population Ratio
22.7M
4.2M
Ages 20-24: United States has 404.9% more people
Men: 9.7M more in United States • Women: 9.1M more in United States
United States: 12.1M men, 11.4M women • Thailand: 2.4M men, 2.3M women
Population Ratio
23.5M
4.7M
Ages 25-29: United States has 370.4% more people
Men: 9.3M more in United States • Women: 8.6M more in United States
United States: 11.8M men, 11.0M women • Thailand: 2.5M men, 2.4M women
Population Ratio
22.8M
4.9M
Ages 30-34: United States has 365.6% more people
Men: 9.6M more in United States • Women: 8.8M more in United States
United States: 12.2M men, 11.3M women • Thailand: 2.5M men, 2.5M women
Population Ratio
23.5M
5.0M
Ages 35-39: United States has 389.6% more people
Men: 10.1M more in United States • Women: 9.3M more in United States
United States: 12.6M men, 11.8M women • Thailand: 2.5M men, 2.5M women
Population Ratio
24.3M
5.0M
Ages 40-44: United States has 355.3% more people
Men: 9.5M more in United States • Women: 8.7M more in United States
United States: 12.0M men, 11.3M women • Thailand: 2.5M men, 2.6M women
Population Ratio
23.3M
5.1M
Ages 45-49: United States has 317.1% more people
Men: 8.7M more in United States • Women: 8.0M more in United States
United States: 11.2M men, 10.7M women • Thailand: 2.6M men, 2.7M women
Population Ratio
21.9M
5.3M
Ages 50-54: United States has 284.0% more people
Men: 7.8M more in United States • Women: 7.2M more in United States
United States: 10.3M men, 9.9M women • Thailand: 2.5M men, 2.7M women
Population Ratio
20.2M
5.3M
Ages 55-59: United States has 291.3% more people
Men: 8.0M more in United States • Women: 7.5M more in United States
United States: 10.5M men, 10.3M women • Thailand: 2.5M men, 2.8M women
Population Ratio
20.8M
5.3M
Ages 60-64: United States has 335.6% more people
Men: 8.3M more in United States • Women: 8.1M more in United States
United States: 10.5M men, 10.7M women • Thailand: 2.3M men, 2.6M women
Population Ratio
21.2M
4.9M
Ages 65-69: United States has 391.2% more people
Men: 8.0M more in United States • Women: 8.2M more in United States
United States: 9.9M men, 10.4M women • Thailand: 1.9M men, 2.2M women
Population Ratio
20.3M
4.1M
Ages 70-74: United States has 444.1% more people
Men: 6.7M more in United States • Women: 7.2M more in United States
United States: 8.0M men, 9.0M women • Thailand: 1.4M men, 1.7M women
Population Ratio
17.0M
3.1M
Ages 75-79: United States has 509.6% more people
Men: 5.1M more in United States • Women: 5.9M more in United States
United States: 6.0M men, 7.1M women • Thailand: 920K men, 1.2M women
Population Ratio
13.2M
2.2M
Ages 80-84: United States has 546.4% more people
Men: 3.1M more in United States • Women: 3.9M more in United States
United States: 3.6M men, 4.6M women • Thailand: 516K men, 763K women
Population Ratio
8.3M
1.3M
Ages 85-89: United States has 476.5% more people
Men: 1.5M more in United States • Women: 2.2M more in United States
United States: 1.8M men, 2.6M women • Thailand: 289K men, 474K women
Population Ratio
4.4M
762K
Ages 90-94: United States has 457.5% more people
Men: 571K more in United States • Women: 1.0M more in United States
United States: 694K men, 1.3M women • Thailand: 123K men, 228K women
Population Ratio
2.0M
351K
Ages 95-99: United States has 440.4% more people
Men: 132K more in United States • Women: 316K more in United States
United States: 166K men, 384K women • Thailand: 34K men, 68K women
Population Ratio
550K
102K
Ages 100+: United States has 334.0% more people
Men: 12K more in United States • Women: 47K more in United States
United States: 18K men, 59K women • Thailand: 6K men, 12K women
Population Ratio
77K
18K

Demographic comparison, 2026

IndicatorUnited StatesThailandDifference
Population (2026)349,035,49471,559,615United States has 277.5 million more (4.9×)
Change 2025–2026+0.5% (Growing)-0.1% (Declining)
Median age (2026)38.741.0Thailand older by 2.3 yrs
Total fertility rate1.63 — 0.48 below replacement1.19 — 0.91 below replacement
Fertility rate, 2030 (UN projection)1.631.20
Birth rate (per 1,000)10.57.9
Population 2050 (UN projection)380.8 million (+9.1%)66.4 million (-7.2%)
Peak populationPeaks 2100Peaks 2022

Differences by age group, 2026

AgeUnited States (M / F)Thailand (M / F)Difference
0-49549K / 9091K1505K / 1415KUnited States has 538.3% more people aged 0-4
5-99938K / 9464K1692K / 1593KUnited States has 490.5% more people aged 5-9
10-1410774K / 10190K1991K / 1877KUnited States has 442.0% more people aged 10-14
15-1911671K / 11002K2158K / 2048KUnited States has 439.1% more people aged 15-19
20-2412122K / 11403K2378K / 2281KUnited States has 404.9% more people aged 20-24
25-2911801K / 11017K2481K / 2369KUnited States has 370.4% more people aged 25-29
30-3412170K / 11342K2545K / 2504KUnited States has 365.6% more people aged 30-34
35-3912570K / 11772K2487K / 2485KUnited States has 389.6% more people aged 35-39
40-4412004K / 11314K2532K / 2590KUnited States has 355.3% more people aged 40-44
45-4911227K / 10699K2564K / 2693KUnited States has 317.1% more people aged 45-49
50-5410280K / 9907K2508K / 2749KUnited States has 284.0% more people aged 50-54
55-5910481K / 10283K2495K / 2811KUnited States has 291.3% more people aged 55-59
60-6410548K / 10660K2265K / 2604KUnited States has 335.6% more people aged 60-64
65-699910K / 10428K1897K / 2243KUnited States has 391.2% more people aged 65-69
70-748040K / 8981K1387K / 1742KUnited States has 444.1% more people aged 70-74
75-796042K / 7108K920K / 1237KUnited States has 509.6% more people aged 75-79
80-843636K / 4632K516K / 763KUnited States has 546.4% more people aged 80-84
85-891758K / 2638K289K / 474KUnited States has 476.5% more people aged 85-89
90-94694K / 1262K123K / 228KUnited States has 457.5% more people aged 90-94
95-99166K / 384K34K / 68KUnited States has 440.4% more people aged 95-99
100+18K / 59K6K / 12KUnited States has 334.0% more people aged 100+

Frequently Asked Questions

Which has more people, USA or Thailand?

The United States has more: 349.0 million vs 71.6 million in 2026 — 4.9× as many, 277.5 million more people.

Which country is older?

Thailand, with a median age of 41.0 vs 38.7 in the United States (2026).

Which has higher fertility?

The United States, at 1.63 children per woman vs 1.19 in Thailand. Replacement is 2.1, so both are below it.

How will USA and Thailand compare in 2050?

By 2050 the UN projects the United States at 380.8 million (+9.1% from 2026) and Thailand at 66.4 million (-7.2%).

Are USA and Thailand growing or shrinking?

The United States is growing (+0.5% in 2026); Thailand is declining (-0.1%).

Explore Individual Countries

United States population pyramid→Thailand population pyramid→

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