United Kingdom Generation Breakdown 2026: How Many Millennials, Gen Z, and Boomers?
In the United Kingdom, Millennials are the largest generation: 14,801,382 people, 21.2% of the population.
Population on 1 July 2026, UN World Population Prospects 2024 (medium variant). See the population pyramid for the United Kingdom.
- Gen Beta — 1,033,990 (1.5%)
- Gen Alpha — 9,338,332 (13.4%)
- Gen Z — 13,722,048 (19.6%)
- Millennials — 14,801,382 (21.2%)
- Gen X — 14,131,477 (20.2%)
- Baby Boomers — 13,286,847 (19.0%)
- Silent Generation — 3,578,050 (5.1%)
- Greatest Generation — 39,404 (0.1%)
Generation Population Distribution - United Kingdom
Generation Breakdown by Population - United Kingdom
Total Population: 69,931,528
| Generation | Birth Years | Age Range (2026) | Population | % of Total | Male | Female |
|---|---|---|---|---|---|---|
Gen Beta | 2025–2039 | 0–1 years | 1,033,990 | 1.5% | 530,480 | 503,510 |
Gen Alpha | 2013–2024 | 2–13 years | 9,338,332 | 13.4% | 4,788,865 | 4,549,467 |
Gen Z | 1997–2012 | 14–29 years | 13,722,048 | 19.6% | 7,034,966 | 6,687,081 |
Millennials | 1981–1996 | 30–45 years | 14,801,382 | 21.2% | 7,419,228 | 7,382,154 |
Gen X | 1965–1980 | 46–61 years | 14,131,477 | 20.2% | 6,907,180 | 7,224,296 |
Baby Boomers | 1946–1964 | 62–80 years | 13,286,847 | 19.0% | 6,278,573 | 7,008,274 |
Silent Generation | 1928–1945 | 81–98 years | 3,578,050 | 5.1% | 1,484,494 | 2,093,557 |
Greatest Generation | before 1928 | 99+ years | 39,404 | 0.1% | 9,348 | 30,056 |
| Total | 69,931,528 | 100.0% | 34,453,134 | 35,478,394 | ||
Population on 1 July 2026, UN World Population Prospects 2024 (medium variant). Generation definitions: Pew Research Center (Silent–Gen Z); McCrindle Research (Gen Alpha, Gen Beta).
United Kingdom Generations: Frequently Asked Questions
Population on 1 July 2026, UN World Population Prospects 2024 (medium variant).
What is the largest generation in the United Kingdom?
Millennials are the largest generation in the United Kingdom, with 14,801,382 people (21.2%).
How many Gen Z, Millennials and Baby Boomers are in the United Kingdom?
The United Kingdom has 13,722,048 Gen Z, 14,801,382 Millennials and 13,286,847 Baby Boomers.
What share of the United Kingdom is Gen Z, and how does it rank?
Gen Z is 19.6% of the United Kingdom, the 46th-lowest Gen Z share of the 194 countries.
How do the youngest and oldest generations compare in the United Kingdom?
The youngest generations, Gen Alpha and Gen Beta, together number 10,372,322 in the United Kingdom, versus 3,617,454 in the oldest two, the Silent and Greatest generations.
How does the largest generation in the United Kingdom compare with the world?
Millennials are 21.2% of the United Kingdom, compared with 22.5% worldwide.
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