PopulationPyramids
UN World Population Prospects Data Visualized

USA vs Japan: Population Comparison 2026

The United States has 226,607,763 more people than Japan (2.9× as many): 349.0 million vs 122.4 million in 2026. Median age is 38.7 in the United States and 50.2 in Japan; fertility is 1.63 vs 1.23 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%)

Japan

2026
0
people
Median age
50.2
Fertility (TFR)
1.23
Working age (15–64)
58.8%
Trend
Declining (-0.55%)

Population pyramids, 2026

Total Population

United States

349.0M

vs

Japan

122.4M

Youth (0-14)

United States

16.9%

vs

Japan

11.0%

Elderly (65+)

United States

18.8%

vs

Japan

30.2%

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 Japan for each age group, split by gender:

Left Side (Males)

Blue = United States has more males

Green = Japan has more males

Right Side (Females)

Pink = United States has more females

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

Notable Differences (>20% variance):

Ages 0-4: United States has 384.4% more people
Men: 7.6M more in United States • Women: 7.2M more in United States
United States: 9.5M men, 9.1M women • Japan: 2.0M men, 1.9M women
Population Ratio
18.6M
3.8M
Ages 5-9: United States has 331.8% more people
Men: 7.6M more in United States • Women: 7.3M more in United States
United States: 9.9M men, 9.5M women • Japan: 2.3M men, 2.2M women
Population Ratio
19.4M
4.5M
Ages 10-14: United States has 304.4% more people
Men: 8.1M more in United States • Women: 7.7M more in United States
United States: 10.8M men, 10.2M women • Japan: 2.7M men, 2.5M women
Population Ratio
21.0M
5.2M
Ages 15-19: United States has 301.8% more people
Men: 8.8M more in United States • Women: 8.3M more in United States
United States: 11.7M men, 11.0M women • Japan: 2.9M men, 2.7M women
Population Ratio
22.7M
5.6M
Ages 20-24: United States has 282.4% more people
Men: 9.0M more in United States • Women: 8.4M more in United States
United States: 12.1M men, 11.4M women • Japan: 3.1M men, 3.0M women
Population Ratio
23.5M
6.2M
Ages 25-29: United States has 271.3% more people
Men: 8.7M more in United States • Women: 8.0M more in United States
United States: 11.8M men, 11.0M women • Japan: 3.1M men, 3.0M women
Population Ratio
22.8M
6.1M
Ages 30-34: United States has 291.6% more people
Men: 9.1M more in United States • Women: 8.4M more in United States
United States: 12.2M men, 11.3M women • Japan: 3.1M men, 2.9M women
Population Ratio
23.5M
6.0M
Ages 35-39: United States has 285.3% more people
Men: 9.4M more in United States • Women: 8.7M more in United States
United States: 12.6M men, 11.8M women • Japan: 3.2M men, 3.1M women
Population Ratio
24.3M
6.3M
Ages 40-44: United States has 227.1% more people
Men: 8.4M more in United States • Women: 7.8M more in United States
United States: 12.0M men, 11.3M women • Japan: 3.6M men, 3.5M women
Population Ratio
23.3M
7.1M
Ages 45-49: United States has 169.7% more people
Men: 7.1M more in United States • Women: 6.7M more in United States
United States: 11.2M men, 10.7M women • Japan: 4.1M men, 4.0M women
Population Ratio
21.9M
8.1M
Ages 50-54: United States has 106.0% more people
Men: 5.3M more in United States • Women: 5.0M more in United States
United States: 10.3M men, 9.9M women • Japan: 4.9M men, 4.9M women
Population Ratio
20.2M
9.8M
Ages 55-59: United States has 133.1% more people
Men: 6.0M more in United States • Women: 5.9M more in United States
United States: 10.5M men, 10.3M women • Japan: 4.5M men, 4.4M women
Population Ratio
20.8M
8.9M
Ages 60-64: United States has 175.2% more people
Men: 6.7M more in United States • Women: 6.8M more in United States
United States: 10.5M men, 10.7M women • Japan: 3.9M men, 3.8M women
Population Ratio
21.2M
7.7M
Ages 65-69: United States has 181.6% more people
Men: 6.3M more in United States • Women: 6.8M more in United States
United States: 9.9M men, 10.4M women • Japan: 3.6M men, 3.6M women
Population Ratio
20.3M
7.2M
Ages 70-74: United States has 127.0% more people
Men: 4.4M more in United States • Women: 5.1M more in United States
United States: 8.0M men, 9.0M women • Japan: 3.6M men, 3.9M women
Population Ratio
17.0M
7.5M
Ages 75-79: United States has 49.3% more people
Men: 2.0M more in United States • Women: 2.3M more in United States
United States: 6.0M men, 7.1M women • Japan: 4.0M men, 4.8M women
Population Ratio
13.2M
8.8M
Ages 80-84: United States has 37.0% more people
Men: 1.1M more in United States • Women: 1.2M more in United States
United States: 3.6M men, 4.6M women • Japan: 2.6M men, 3.5M women
Population Ratio
8.3M
6.0M
Ages 95-99: Japan has 22.0% more people
Men: 12K more in United States • Women: 167K more in Japan
United States: 166K men, 384K women • Japan: 153K men, 551K women
Population Ratio
550K
704K
Ages 100+: Japan has 38.9% more people
Men: 391 more in Japan • Women: 49K more in Japan
United States: 18K men, 59K women • Japan: 18K men, 108K women
Population Ratio
77K
126K

Demographic comparison, 2026

IndicatorUnited StatesJapanDifference
Population (2026)349,035,494122,427,731United States has 226.6 million more (2.9×)
Change 2025–2026+0.5% (Growing)-0.5% (Declining)
Median age (2026)38.750.2Japan older by 11.5 yrs
Total fertility rate1.63 — 0.48 below replacement1.23 — 0.87 below replacement
Fertility rate, 2030 (UN projection)1.631.26
Birth rate (per 1,000)10.56.1
Population 2050 (UN projection)380.8 million (+9.1%)105.1 million (-14.1%)
Peak populationPeaks 2100Peaks 2009

Differences by age group, 2026

AgeUnited States (M / F)Japan (M / F)Difference
0-49549K / 9091K1968K / 1879KUnited States has 384.4% more people aged 0-4
5-99938K / 9464K2301K / 2192KUnited States has 331.8% more people aged 5-9
10-1410774K / 10190K2663K / 2521KUnited States has 304.4% more people aged 10-14
15-1911671K / 11002K2897K / 2746KUnited States has 301.8% more people aged 15-19
20-2412122K / 11403K3148K / 3004KUnited States has 282.4% more people aged 20-24
25-2911801K / 11017K3134K / 3011KUnited States has 271.3% more people aged 25-29
30-3412170K / 11342K3062K / 2942KUnited States has 291.6% more people aged 30-34
35-3912570K / 11772K3217K / 3101KUnited States has 285.3% more people aged 35-39
40-4412004K / 11314K3605K / 3524KUnited States has 227.1% more people aged 40-44
45-4911227K / 10699K4098K / 4031KUnited States has 169.7% more people aged 45-49
50-5410280K / 9907K4934K / 4866KUnited States has 106.0% more people aged 50-54
55-5910481K / 10283K4495K / 4412KUnited States has 133.1% more people aged 55-59
60-6410548K / 10660K3878K / 3829KUnited States has 175.2% more people aged 60-64
65-699910K / 10428K3575K / 3647KUnited States has 181.6% more people aged 65-69
70-748040K / 8981K3605K / 3893KUnited States has 127.0% more people aged 70-74
75-796042K / 7108K4025K / 4786KUnited States has 49.3% more people aged 75-79
80-843636K / 4632K2574K / 3459KUnited States has 37.0% more people aged 80-84
85-891758K / 2638K1627K / 2678KUnited States has 2.1% more people aged 85-89
90-94694K / 1262K683K / 1586KJapan has 16.0% more people aged 90-94
95-99166K / 384K153K / 551KJapan has 28.1% more people aged 95-99
100+18K / 59K18K / 108KJapan has 63.5% more people aged 100+

Frequently Asked Questions

Which has more people, USA or Japan?

The United States has more: 349.0 million vs 122.4 million in 2026 — 2.9× as many, 226.6 million more people.

Which country is older?

Japan, with a median age of 50.2 vs 38.7 in the United States (2026).

Which has higher fertility?

The United States, at 1.63 children per woman vs 1.23 in Japan. Replacement is 2.1, so both are below it.

How will USA and Japan compare in 2050?

By 2050 the UN projects the United States at 380.8 million (+9.1% from 2026) and Japan at 105.1 million (-14.1%).

Are USA and Japan growing or shrinking?

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

Explore Individual Countries

United States population pyramid→Japan population pyramid→

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