PopulationPyramids
UN World Population Prospects Data Visualized

USA vs UK: Population Comparison 2026

The United States has 279,103,965 more people than the United Kingdom (5.0× as many): 349.0 million vs 69.9 million in 2026. Median age is 38.7 in the United States and 40.2 in the United Kingdom; fertility is 1.63 vs 1.53 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%)

United Kingdom

2026
0
people
Median age
40.2
Fertility (TFR)
1.53
Working age (15–64)
63.3%
Trend
Growing (+0.55%)

Population pyramids, 2026

Total Population

United States

349.0M

vs

United Kingdom

69.9M

Youth (0-14)

United States

16.9%

vs

United Kingdom

16.7%

Elderly (65+)

United States

18.8%

vs

United Kingdom

19.9%

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

Left Side (Males)

Blue = United States has more males

Green = United Kingdom has more males

Right Side (Females)

Pink = United States has more females

Orange = United Kingdom 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 United Kingdom has more males in that age group.

Notable Differences (>20% variance):

Ages 0-4: United States has 428.9% more people
Men: 7.7M more in United States • Women: 7.4M more in United States
United States: 9.5M men, 9.1M women • United Kingdom: 1.8M men, 1.7M women
Population Ratio
18.6M
3.5M
Ages 5-9: United States has 399.6% more people
Men: 7.9M more in United States • Women: 7.6M more in United States
United States: 9.9M men, 9.5M women • United Kingdom: 2.0M men, 1.9M women
Population Ratio
19.4M
3.9M
Ages 10-14: United States has 389.2% more people
Men: 8.6M more in United States • Women: 8.1M more in United States
United States: 10.8M men, 10.2M women • United Kingdom: 2.2M men, 2.1M women
Population Ratio
21.0M
4.3M
Ages 15-19: United States has 426.6% more people
Men: 9.5M more in United States • Women: 8.9M more in United States
United States: 11.7M men, 11.0M women • United Kingdom: 2.2M men, 2.1M women
Population Ratio
22.7M
4.3M
Ages 20-24: United States has 467.1% more people
Men: 10.0M more in United States • Women: 9.4M more in United States
United States: 12.1M men, 11.4M women • United Kingdom: 2.1M men, 2.0M women
Population Ratio
23.5M
4.1M
Ages 25-29: United States has 418.2% more people
Men: 9.5M more in United States • Women: 8.9M more in United States
United States: 11.8M men, 11.0M women • United Kingdom: 2.3M men, 2.1M women
Population Ratio
22.8M
4.4M
Ages 30-34: United States has 403.1% more people
Men: 9.8M more in United States • Women: 9.0M more in United States
United States: 12.2M men, 11.3M women • United Kingdom: 2.4M men, 2.3M women
Population Ratio
23.5M
4.7M
Ages 35-39: United States has 430.0% more people
Men: 10.3M more in United States • Women: 9.5M more in United States
United States: 12.6M men, 11.8M women • United Kingdom: 2.3M men, 2.3M women
Population Ratio
24.3M
4.6M
Ages 40-44: United States has 404.4% more people
Men: 9.7M more in United States • Women: 9.0M more in United States
United States: 12.0M men, 11.3M women • United Kingdom: 2.3M men, 2.3M women
Population Ratio
23.3M
4.6M
Ages 45-49: United States has 410.7% more people
Men: 9.1M more in United States • Women: 8.5M more in United States
United States: 11.2M men, 10.7M women • United Kingdom: 2.1M men, 2.2M women
Population Ratio
21.9M
4.3M
Ages 50-54: United States has 361.0% more people
Men: 8.1M more in United States • Women: 7.7M more in United States
United States: 10.3M men, 9.9M women • United Kingdom: 2.2M men, 2.2M women
Population Ratio
20.2M
4.4M
Ages 55-59: United States has 353.9% more people
Men: 8.3M more in United States • Women: 7.9M more in United States
United States: 10.5M men, 10.3M women • United Kingdom: 2.2M men, 2.4M women
Population Ratio
20.8M
4.6M
Ages 60-64: United States has 392.9% more people
Men: 8.5M more in United States • Women: 8.4M more in United States
United States: 10.5M men, 10.7M women • United Kingdom: 2.1M men, 2.2M women
Population Ratio
21.2M
4.3M
Ages 65-69: United States has 433.8% more people
Men: 8.1M more in United States • Women: 8.4M more in United States
United States: 9.9M men, 10.4M women • United Kingdom: 1.8M men, 2.0M women
Population Ratio
20.3M
3.8M
Ages 70-74: United States has 422.9% more people
Men: 6.5M more in United States • Women: 7.2M more in United States
United States: 8.0M men, 9.0M women • United Kingdom: 1.5M men, 1.7M women
Population Ratio
17.0M
3.3M
Ages 75-79: United States has 336.4% more people
Men: 4.6M more in United States • Women: 5.5M more in United States
United States: 6.0M men, 7.1M women • United Kingdom: 1.4M men, 1.6M women
Population Ratio
13.2M
3.0M
Ages 80-84: United States has 311.5% more people
Men: 2.8M more in United States • Women: 3.5M more in United States
United States: 3.6M men, 4.6M women • United Kingdom: 881K men, 1.1M women
Population Ratio
8.3M
2.0M
Ages 85-89: United States has 275.1% more people
Men: 1.3M more in United States • Women: 2.0M more in United States
United States: 1.8M men, 2.6M women • United Kingdom: 489K men, 683K women
Population Ratio
4.4M
1.2M
Ages 90-94: United States has 273.7% more people
Men: 501K more in United States • Women: 931K more in United States
United States: 694K men, 1.3M women • United Kingdom: 193K men, 331K women
Population Ratio
2.0M
523K
Ages 95-99: United States has 289.7% more people
Men: 124K more in United States • Women: 285K more in United States
United States: 166K men, 384K women • United Kingdom: 42K men, 99K women
Population Ratio
550K
141K
Ages 100+: United States has 308.4% more people
Men: 14K more in United States • Women: 44K more in United States
United States: 18K men, 59K women • United Kingdom: 4K men, 15K women
Population Ratio
77K
19K

Demographic comparison, 2026

IndicatorUnited StatesUnited KingdomDifference
Population (2026)349,035,49469,931,529United States has 279.1 million more (5.0×)
Change 2025–2026+0.5% (Growing)+0.5% (Growing)
Median age (2026)38.740.2United Kingdom older by 1.5 yrs
Total fertility rate1.63 — 0.48 below replacement1.53 — 0.57 below replacement
Fertility rate, 2030 (UN projection)1.631.52
Birth rate (per 1,000)10.59.7
Population 2050 (UN projection)380.8 million (+9.1%)75.5 million (+8.0%)
Peak populationPeaks 2100Peaks 2072

Differences by age group, 2026

AgeUnited States (M / F)United Kingdom (M / F)Difference
0-49549K / 9091K1807K / 1717KUnited States has 428.9% more people aged 0-4
5-99938K / 9464K1992K / 1892KUnited States has 399.6% more people aged 5-9
10-1410774K / 10190K2197K / 2089KUnited States has 389.2% more people aged 10-14
15-1911671K / 11002K2205K / 2100KUnited States has 426.6% more people aged 15-19
20-2412122K / 11403K2124K / 2024KUnited States has 467.1% more people aged 20-24
25-2911801K / 11017K2263K / 2140KUnited States has 418.2% more people aged 25-29
30-3412170K / 11342K2380K / 2294KUnited States has 403.1% more people aged 30-34
35-3912570K / 11772K2293K / 2300KUnited States has 430.0% more people aged 35-39
40-4412004K / 11314K2288K / 2335KUnited States has 404.4% more people aged 40-44
45-4911227K / 10699K2125K / 2168KUnited States has 410.7% more people aged 45-49
50-5410280K / 9907K2176K / 2203KUnited States has 361.0% more people aged 50-54
55-5910481K / 10283K2189K / 2386KUnited States has 353.9% more people aged 55-59
60-6410548K / 10660K2054K / 2249KUnited States has 392.9% more people aged 60-64
65-699910K / 10428K1822K / 1988KUnited States has 433.8% more people aged 65-69
70-748040K / 8981K1521K / 1734KUnited States has 422.9% more people aged 70-74
75-796042K / 7108K1409K / 1604KUnited States has 336.4% more people aged 75-79
80-843636K / 4632K881K / 1129KUnited States has 311.5% more people aged 80-84
85-891758K / 2638K489K / 683KUnited States has 275.1% more people aged 85-89
90-94694K / 1262K193K / 331KUnited States has 273.7% more people aged 90-94
95-99166K / 384K42K / 99KUnited States has 289.7% more people aged 95-99
100+18K / 59K4K / 15KUnited States has 308.4% more people aged 100+

Frequently Asked Questions

Which has more people, USA or UK?

The United States has more: 349.0 million vs 69.9 million in 2026 — 5.0× as many, 279.1 million more people.

Which country is older?

The United Kingdom, with a median age of 40.2 vs 38.7 in the United States (2026).

Which has higher fertility?

The United States, at 1.63 children per woman vs 1.53 in the United Kingdom. Replacement is 2.1, so both are below it.

How will USA and UK compare in 2050?

By 2050 the UN projects the United States at 380.8 million (+9.1% from 2026) and the United Kingdom at 75.5 million (+8.0%).

Are USA and UK growing or shrinking?

The United States is growing (+0.5% in 2026); the United Kingdom is growing (+0.5%).

Explore Individual Countries

United States population pyramid→United Kingdom population pyramid→

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