Spain Generation Breakdown 2026: How Many Millennials, Gen Z, and Boomers?

By Marko Visic · Updated October 19, 2026

A UN projection for 1 July 2026 from World Population Prospects 2024 (medium variant).

In Spain, Gen X is the largest generation: 12,298,071 people, 25.7% of the population.

See the population pyramid for Spain.

Gen Beta: 497,167 (1.0%)
Gen Alpha: 4,684,972 (9.8%)
Gen Z: 8,134,122 (17.0%)
Millennials: 9,229,942 (19.3%)
Gen X: 12,298,071 (25.7%)
Baby Boomers: 10,004,665 (20.9%)
Silent Generation: 2,963,603 (6.2%)
Greatest Generation: 38,250 (0.1%)

47,850,792

people on 1 July 2026

25.7%

Gen X, the largest generation

17.0%

Gen Z share, the 24th-lowest of the 194 countries

5,182,139

under 14 (Gen Alpha + Gen Beta)

3,001,853

aged 81+ (Silent + Greatest)

Generation Population Distribution - Spain

Gen Beta: 1.0%

Gen Alpha: 9.8%

Gen Z: 17.0%

Millennials: 19.3%

Gen X: 25.7%

Baby Boomers: 20.9%

Silent Generation: 6.2%

Greatest Generation: 0.1%

Generation Breakdown by Population - Spain

Total Population: 47,850,792

Generation	Birth Years	Age Range (2026)	Population	% of Total	Male	Female
Gen Beta	2025–2039	0–1 years	497,167	1.0%	256,037	241,130
Gen Alpha	2013–2024	2–13 years	4,684,972	9.8%	2,406,694	2,278,277
Gen Z	1997–2012	14–29 years	8,134,122	17.0%	4,174,567	3,959,556
Millennials	1981–1996	30–45 years	9,229,942	19.3%	4,647,453	4,582,489
Gen X	1965–1980	46–61 years	12,298,071	25.7%	6,175,262	6,122,810
Baby Boomers	1946–1964	62–80 years	10,004,665	20.9%	4,688,046	5,316,618
Silent Generation	1928–1945	81–98 years	2,963,603	6.2%	1,126,009	1,837,594
Greatest Generation	before 1928	99+ years	38,250	0.1%	8,256	29,994
Total			47,850,792	100.0%	23,482,325	24,368,468

Projected population on 1 July 2026, UN World Population Prospects 2024 (medium variant). Generation definitions: Pew Research Center (Greatest Generation to Gen Z); McCrindle Research (Gen Alpha, Gen Beta).

Spain Generations: Frequently Asked Questions

Population on 1 July 2026, UN World Population Prospects 2024 (medium variant).

What is the largest generation in Spain?

Gen X is the largest generation in Spain, with 12,298,071 people (25.7%).

How many Gen Z, Millennials and Baby Boomers are in Spain?

Spain has 8,134,122 Gen Z, 9,229,942 Millennials and 10,004,665 Baby Boomers.

What share of Spain is Gen Z, and how does it rank?

Gen Z is 17.0% of Spain, the 24th-lowest Gen Z share of the 194 countries.

How do the youngest and oldest generations compare in Spain?

The youngest generations, Gen Alpha and Gen Beta, together number 5,182,139 in Spain, versus 3,001,853 in the oldest two, the Silent and Greatest generations.

How does the largest generation in Spain compare with the world?

Gen X is 25.7% of Spain, compared with 17.5% worldwide.

Explore Generation Data by Country

Other countries in Europe. See all 194 countries →