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

Q: What is the largest generation in Sri Lanka?

Gen Z is the largest generation in Sri Lanka, with 5,544,121 people (23.7%).

Q: How many Gen Z, Millennials and Baby Boomers are in Sri Lanka?

Sri Lanka has 5,544,121 Gen Z, 5,075,510 Millennials and 3,348,984 Baby Boomers.

Q: What share of Sri Lanka is Gen Z, and how does it rank?

Gen Z is 23.7% of Sri Lanka, the 87th-lowest Gen Z share of the 194 countries.

Q: How do the youngest and oldest generations compare in Sri Lanka?

The youngest generations, Gen Alpha and Gen Beta, together number 4,461,303 in Sri Lanka, versus 466,416 in the oldest two, the Silent and Greatest generations.

Q: How does the largest generation in Sri Lanka compare with the world?

Gen Z is 23.7% of Sri Lanka, compared with 24.7% worldwide.

By Marko Visic · Updated October 19, 2026

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

In Sri Lanka, Gen Z is the largest generation: 5,544,121 people, 23.7% of the population.

See the population pyramid for Sri Lanka.

Gen Beta: 473,135 (2.0%)
Gen Alpha: 3,988,168 (17.1%)
Gen Z: 5,544,121 (23.7%)
Millennials: 5,075,510 (21.7%)
Gen X: 4,451,980 (19.1%)
Baby Boomers: 3,348,984 (14.3%)
Silent Generation: 464,786 (2.0%)
Greatest Generation: 1,630 (<0.1%)

23,348,315

people on 1 July 2026

23.7%

Gen Z, the largest generation

23.7%

Gen Z share, the 87th-lowest of the 194 countries

4,461,303

under 14 (Gen Alpha + Gen Beta)

466,416

aged 81+ (Silent + Greatest)

Generation Population Distribution - Sri Lanka

Gen Beta: 2.0%

Gen Alpha: 17.1%

Gen Z: 23.7%

Millennials: 21.7%

Gen X: 19.1%

Baby Boomers: 14.3%

Silent Generation: 2.0%

Greatest Generation: <0.1%

Generation Breakdown by Population - Sri Lanka

Total Population: 23,348,315

Generation	Birth Years	Age Range (2026)	Population	% of Total	Male	Female
Gen Beta	2025–2039	0–1 years	473,135	2.0%	241,542	231,594
Gen Alpha	2013–2024	2–13 years	3,988,168	17.1%	2,035,082	1,953,087
Gen Z	1997–2012	14–29 years	5,544,121	23.7%	2,806,162	2,737,959
Millennials	1981–1996	30–45 years	5,075,510	21.7%	2,470,982	2,604,528
Gen X	1965–1980	46–61 years	4,451,980	19.1%	2,124,401	2,327,579
Baby Boomers	1946–1964	62–80 years	3,348,984	14.3%	1,451,972	1,897,013
Silent Generation	1928–1945	81–98 years	464,786	2.0%	162,332	302,454
Greatest Generation	before 1928	99+ years	1,630	<0.1%	408	1,222
Total			23,348,315	100.0%	11,292,880	12,055,436

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).

Sri Lanka Generations: Frequently Asked Questions

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

What is the largest generation in Sri Lanka?

Gen Z is the largest generation in Sri Lanka, with 5,544,121 people (23.7%).

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

Sri Lanka has 5,544,121 Gen Z, 5,075,510 Millennials and 3,348,984 Baby Boomers.

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

Gen Z is 23.7% of Sri Lanka, the 87th-lowest Gen Z share of the 194 countries.

How do the youngest and oldest generations compare in Sri Lanka?

The youngest generations, Gen Alpha and Gen Beta, together number 4,461,303 in Sri Lanka, versus 466,416 in the oldest two, the Silent and Greatest generations.

How does the largest generation in Sri Lanka compare with the world?

Gen Z is 23.7% of Sri Lanka, compared with 24.7% worldwide.

Explore Generation Data by Country

Other countries in Asia. See all 194 countries →