PopulationPyramids
UN World Population Prospects Data Visualized

USA vs South Korea: Population Comparison 2026

The United States has 297,435,106 more people than South Korea (6.8× as many): 349.0 million vs 51.6 million in 2026. Median age is 38.7 in the United States and 46.2 in South Korea; fertility is 1.63 vs 0.76 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%)

South Korea

2026
0
people
Median age
46.2
Fertility (TFR)
0.76
Working age (15–64)
68.7%
Trend
Declining (-0.13%)

Population pyramids, 2026

Total Population

United States

349.0M

vs

South Korea

51.6M

Youth (0-14)

United States

16.9%

vs

South Korea

9.8%

Elderly (65+)

United States

18.8%

vs

South Korea

21.4%

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 South Korea for each age group, split by gender:

Left Side (Males)

Blue = United States has more males

Green = South Korea has more males

Right Side (Females)

Pink = United States has more females

Orange = South Korea 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 South Korea has more males in that age group.

Notable Differences (>20% variance):

Ages 0-4: United States has 1405.1% more people
Men: 8.9M more in United States • Women: 8.5M more in United States
United States: 9.5M men, 9.1M women • South Korea: 635K men, 603K women
Population Ratio
18.6M
1.2M
Ages 5-9: United States has 1114.8% more people
Men: 9.1M more in United States • Women: 8.7M more in United States
United States: 9.9M men, 9.5M women • South Korea: 818K men, 779K women
Population Ratio
19.4M
1.6M
Ages 10-14: United States has 839.9% more people
Men: 9.6M more in United States • Women: 9.1M more in United States
United States: 10.8M men, 10.2M women • South Korea: 1.1M men, 1.1M women
Population Ratio
21.0M
2.2M
Ages 15-19: United States has 868.3% more people
Men: 10.5M more in United States • Women: 9.9M more in United States
United States: 11.7M men, 11.0M women • South Korea: 1.2M men, 1.1M women
Population Ratio
22.7M
2.3M
Ages 20-24: United States has 808.6% more people
Men: 10.8M more in United States • Women: 10.2M more in United States
United States: 12.1M men, 11.4M women • South Korea: 1.3M men, 1.2M women
Population Ratio
23.5M
2.6M
Ages 25-29: United States has 581.4% more people
Men: 10.0M more in United States • Women: 9.4M more in United States
United States: 11.8M men, 11.0M women • South Korea: 1.8M men, 1.6M women
Population Ratio
22.8M
3.3M
Ages 30-34: United States has 541.6% more people
Men: 10.2M more in United States • Women: 9.6M more in United States
United States: 12.2M men, 11.3M women • South Korea: 2.0M men, 1.7M women
Population Ratio
23.5M
3.7M
Ages 35-39: United States has 633.9% more people
Men: 10.8M more in United States • Women: 10.2M more in United States
United States: 12.6M men, 11.8M women • South Korea: 1.8M men, 1.6M women
Population Ratio
24.3M
3.3M
Ages 40-44: United States has 536.0% more people
Men: 10.1M more in United States • Women: 9.5M more in United States
United States: 12.0M men, 11.3M women • South Korea: 1.9M men, 1.8M women
Population Ratio
23.3M
3.7M
Ages 45-49: United States has 457.1% more people
Men: 9.2M more in United States • Women: 8.8M more in United States
United States: 11.2M men, 10.7M women • South Korea: 2.0M men, 1.9M women
Population Ratio
21.9M
3.9M
Ages 50-54: United States has 383.5% more people
Men: 8.2M more in United States • Women: 7.8M more in United States
United States: 10.3M men, 9.9M women • South Korea: 2.1M men, 2.1M women
Population Ratio
20.2M
4.2M
Ages 55-59: United States has 374.2% more people
Men: 8.3M more in United States • Women: 8.1M more in United States
United States: 10.5M men, 10.3M women • South Korea: 2.2M men, 2.2M women
Population Ratio
20.8M
4.4M
Ages 60-64: United States has 422.6% more people
Men: 8.5M more in United States • Women: 8.6M more in United States
United States: 10.5M men, 10.7M women • South Korea: 2.0M men, 2.0M women
Population Ratio
21.2M
4.1M
Ages 65-69: United States has 425.1% more people
Men: 8.0M more in United States • Women: 8.4M more in United States
United States: 9.9M men, 10.4M women • South Korea: 1.9M men, 2.0M women
Population Ratio
20.3M
3.9M
Ages 70-74: United States has 525.7% more people
Men: 6.8M more in United States • Women: 7.5M more in United States
United States: 8.0M men, 9.0M women • South Korea: 1.3M men, 1.4M women
Population Ratio
17.0M
2.7M
Ages 75-79: United States has 607.1% more people
Men: 5.2M more in United States • Women: 6.1M more in United States
United States: 6.0M men, 7.1M women • South Korea: 835K men, 1.0M women
Population Ratio
13.2M
1.9M
Ages 80-84: United States has 528.7% more people
Men: 3.1M more in United States • Women: 3.8M more in United States
United States: 3.6M men, 4.6M women • South Korea: 529K men, 786K women
Population Ratio
8.3M
1.3M
Ages 85-89: United States has 426.5% more people
Men: 1.5M more in United States • Women: 2.1M more in United States
United States: 1.8M men, 2.6M women • South Korea: 276K men, 559K women
Population Ratio
4.4M
835K
Ages 90-94: United States has 455.0% more people
Men: 611K more in United States • Women: 992K more in United States
United States: 694K men, 1.3M women • South Korea: 83K men, 270K women
Population Ratio
2.0M
352K
Ages 95-99: United States has 507.1% more people
Men: 154K more in United States • Women: 305K more in United States
United States: 166K men, 384K women • South Korea: 12K men, 79K women
Population Ratio
550K
91K
Ages 100+: United States has 487.6% more people
Men: 17K more in United States • Women: 47K more in United States
United States: 18K men, 59K women • South Korea: 684 men, 12K women
Population Ratio
77K
13K

Demographic comparison, 2026

IndicatorUnited StatesSouth KoreaDifference
Population (2026)349,035,49451,600,388United States has 297.4 million more (6.8×)
Change 2025–2026+0.5% (Growing)-0.1% (Declining)
Median age (2026)38.746.2South Korea older by 7.5 yrs
Total fertility rate1.63 — 0.48 below replacement0.76 — 1.34 below replacement
Fertility rate, 2030 (UN projection)1.630.81
Birth rate (per 1,000)10.54.8
Population 2050 (UN projection)380.8 million (+9.1%)45.1 million (-12.5%)
Peak populationPeaks 2100Peaks 2020

Differences by age group, 2026

AgeUnited States (M / F)South Korea (M / F)Difference
0-49549K / 9091K635K / 603KUnited States has 1405.1% more people aged 0-4
5-99938K / 9464K818K / 779KUnited States has 1114.8% more people aged 5-9
10-1410774K / 10190K1142K / 1088KUnited States has 839.9% more people aged 10-14
15-1911671K / 11002K1205K / 1136KUnited States has 868.3% more people aged 15-19
20-2412122K / 11403K1345K / 1244KUnited States has 808.6% more people aged 20-24
25-2911801K / 11017K1752K / 1597KUnited States has 581.4% more people aged 25-29
30-3412170K / 11342K1965K / 1699KUnited States has 541.6% more people aged 30-34
35-3912570K / 11772K1754K / 1563KUnited States has 633.9% more people aged 35-39
40-4412004K / 11314K1898K / 1769KUnited States has 536.0% more people aged 40-44
45-4911227K / 10699K2008K / 1928KUnited States has 457.1% more people aged 45-49
50-5410280K / 9907K2113K / 2063KUnited States has 383.5% more people aged 50-54
55-5910481K / 10283K2185K / 2194KUnited States has 374.2% more people aged 55-59
60-6410548K / 10660K2020K / 2038KUnited States has 422.6% more people aged 60-64
65-699910K / 10428K1875K / 1999KUnited States has 425.1% more people aged 65-69
70-748040K / 8981K1276K / 1444KUnited States has 525.7% more people aged 70-74
75-796042K / 7108K835K / 1024KUnited States has 607.1% more people aged 75-79
80-843636K / 4632K529K / 786KUnited States has 528.7% more people aged 80-84
85-891758K / 2638K276K / 559KUnited States has 426.5% more people aged 85-89
90-94694K / 1262K83K / 270KUnited States has 455.0% more people aged 90-94
95-99166K / 384K12K / 79KUnited States has 507.1% more people aged 95-99
100+18K / 59K1K / 12KUnited States has 487.6% more people aged 100+

Frequently Asked Questions

Which has more people, USA or South Korea?

The United States has more: 349.0 million vs 51.6 million in 2026 — 6.8× as many, 297.4 million more people.

Which country is older?

South Korea, with a median age of 46.2 vs 38.7 in the United States (2026).

Which has higher fertility?

The United States, at 1.63 children per woman vs 0.76 in South Korea. Replacement is 2.1, so both are below it.

How will USA and South Korea compare in 2050?

By 2050 the UN projects the United States at 380.8 million (+9.1% from 2026) and South Korea at 45.1 million (-12.5%).

Are USA and South Korea growing or shrinking?

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

Explore Individual Countries

United States population pyramid→South Korea population pyramid→

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