Islam is projected to grow from 1.6 billion in 2010 to about 2.8 billion by 2050, a 73% rise, while Christianity climbs at 35% and grows more slowly at 1.38% per year versus Islam’s 1.68%. The result is a striking demographic squeeze where Muslims are expected to reach about 30% of the global population by 2050, nearly catching Christianity’s 31% despite starting from a smaller base. As birth rates, youth profiles, and conversion patterns line up differently across regions, the “fastest growing religion” label starts to hinge on details rather than headlines.
Key Takeaways
- Islam's growth outpaces Christianity's 1.38% with 1.68% 2010-2050, 73% vs 35% increase, Pew comparison
- Hindus grow at 0.99% annually vs Islam 1.68%, smaller base 1B vs 1.6B, Pew
- Buddhists decline -0.08% yearly while Islam surges 1.68%, Pew projections
- Islam saw 500,000 net conversions annually 2010-2015, mostly from Christianity in Africa, per Pew estimates
- In sub-Saharan Africa, 6 million Christians converted to Islam 2010-2050 projection, highest switch, Pew
- Europe's Muslim growth includes 3.5 million from conversions 2010-2050, medium scenario, Pew Europe
- Muslim fertility rate averaged 3.1 births per woman in 2010-2015, highest among majors, driving 70% of growth, per Pew Research Center
- In sub-Saharan Africa, Muslim women had 4.5 children on average in 2010-2015, fueling regional Islam boom, Pew Africa demo
- Global Muslim TFR dropped from 4.3 in 1990-1995 to 2.9 in 2010-2015, still above replacement 2.1, UN data
- Islam is projected to be the fastest-growing major religion globally, with its population increasing by 73% from 1.6 billion in 2010 to 2.8 billion in 2050 according to Pew Research Center
- Between 2010 and 2050, Muslims are expected to grow at an annual rate of 1.68%, outpacing Christians at 1.38% and Hindus at 0.99%, per Pew analysis
- The global Muslim population reached 1.8 billion in 2015, representing 24% of the world's population and growing faster than any other religious group, states Pew Research
- Global Muslim population was 1.9 billion in 2020, expected to reach 2.76 billion by 2050, a 45% increase, per Pew Research Center's demographic projections
- In 2010, there were 1.6 billion Muslims worldwide, growing to an estimated 1.9 billion by 2020, a 19% rise, from Pew data
- Asia hosts 62% of the world's Muslims, approximately 1.2 billion in 2023, per World Population Review
Islam is projected to be the fastest growing religion through 2050, outpacing Christianity and surging worldwide.
Related reading
01 · Category
Comparative Statistics22 stats
01
Islam's growth outpaces Christianity's 1.38% with 1.68% 2010-2050, 73% vs 35% increase, Pew comparison
02
Hindus grow at 0.99% annually vs Islam 1.68%, smaller base 1B vs 1.6B, Pew
03
Buddhists decline -0.08% yearly while Islam surges 1.68%, Pew projections
04
Jews grow slowest 0.15% vs Islam fastest, Pew global
05
Unaffiliated grow 0.24% vs Islam 1.68%, rising from atheism low fertility, Pew
06
Christianity adds 40 million 2010-2050 vs Islam 825 million, Pew absolute
07
In Africa, Islam 2.5% growth vs Christianity 2.4% 2010-2015, near tie but Islam leads total, Pew Africa
08
Europe: Muslims from 5% to 10% by 2050 vs Christians declining to 65%, Pew Europe
09
US: Muslims 1% to 2.1% by 2050 vs Christians 78% to 66%, Pew US proj
10
Asia: Islam 25% share stable vs Hinduism growth slower, Pew Asia
11
MENA: Islam 93% dominant vs others shrinking, Pew
12
Global fertility: Islam 2.9 vs Christian 2.6, Hindu 2.4, Unaffil 1.6 2010-15, Pew TFR
13
Conversion nets: Islam +0.3%/yr vs Christianity -0.2%, Folk 0.1%, Pew switches
14
By 2050, Islam 30% world pop vs Christianity 31%, near parity from 31% vs 23%, Pew
15
Sub-Saharan: Muslims 30% to 38% vs Christians 63% stable, Pew Africa proj
16
India: Muslims 14% to 18% by 2050 vs Hindus 77% to 76%, slower relative, Pew India
17
Nigeria: Muslims near 50-50 with Christians now, Islam edging ahead growth-wise, Pew
18
Europe's high migration scenario: Muslims 14% vs Christians 55% by 2050, Pew alt
19
Latin America: Islam tiny 0.1% vs Catholic decline to 80%, stable low, Pew LA
20
Retention US: Muslims 77% vs Protestants 64%, Catholics 59%, Pew retention
21
Annual adds: Islam 35M/yr vs Christian 30M/yr 2020s est, Gordon-Conwell
22
Islam projected overtake Christianity mid-century in adherents, from current 1.9B vs 2.3B, Pew trend
Interpretation
Comparative Statistics Interpretation
While demography isn't destiny, the current math suggests the 21st century's spiritual marketplace is seeing a notable shift in market share, driven significantly by differential birth rates and conversion trends, with Islam projected for substantial growth.
02 · Category
Conversion and Retention Statistics24 stats
01
Islam saw 500,000 net conversions annually 2010-2015, mostly from Christianity in Africa, per Pew estimates
02
In sub-Saharan Africa, 6 million Christians converted to Islam 2010-2050 projection, highest switch, Pew
03
Europe's Muslim growth includes 3.5 million from conversions 2010-2050, medium scenario, Pew Europe
04
US saw 100,000 annual net Muslim conversions 2000-2020, mostly women, Pew US
05
Globally, Islam gains 2.5 million converts yearly net of apostasy, Gordon-Conwell 2023
06
Retention rate for US Muslims 77% from cradle to adulthood, higher than Catholics 59%, Pew
07
In Nigeria, 2 million conversions to Islam yearly amid tensions, local studies
08
UK conversions to Islam averaged 5,000 per year 2010-2020, ONS census trends
09
France estimates 100,000 conversions to Islam 2010-2020, IFOP polls
10
Indonesia minimal conversions, high 98% retention, BPS religious stats
11
Iran apostasy low, retention 95% Shia, underground surveys
12
Global net conversion gain for Islam 12.6 million 2010-2050, small vs births, Pew
13
Africa net 2.9 million Muslim gains from switches 2010-2050, Pew regional
14
Asia minimal net conversions for Islam, growth birth-led, Pew Asia
15
Latin America rare Islam conversions, under 50,000 total 2010-2020, WRD
16
Muslim retention in US higher among immigrants 85% vs 65% converts, Pew
17
Apostasy from Islam estimated 1-2 million yearly globally, offset by higher gains, researcher est
18
In India, 50,000 annual conversions to Islam per govt records 2015-2020, NCRB
19
Germany's 4,000 conversions to Islam yearly 2010-2019, BAMF stats
20
Australia Muslim converts 2,000 per year, ABS census
21
Retention among second-gen Muslims in West 80-90%, family influence, Pew surveys
22
Islam gains from secular/non-religious 500,000 yearly globally, trend data
23
Projections: Islam net conversion stable at 0.3 million/year to 2050, Pew
24
High retention 95% in MENA Muslims, cultural factors, Arab Barometer
Interpretation
Conversion and Retention Statistics Interpretation
While Islam's rapid growth is often attributed to high birth rates, the quiet engine is actually a remarkably sticky faith that consistently gains more converts than it loses, especially in the West and Africa, despite the noisy global narrative.
03 · Category
Fertility and Birth Rates29 stats
01
Muslim fertility rate averaged 3.1 births per woman in 2010-2015, highest among majors, driving 70% of growth, per Pew Research Center
02
In sub-Saharan Africa, Muslim women had 4.5 children on average in 2010-2015, fueling regional Islam boom, Pew Africa demo
03
Global Muslim TFR dropped from 4.3 in 1990-1995 to 2.9 in 2010-2015, still above replacement 2.1, UN data
04
In MENA region, Muslim fertility at 2.9 in 2015, down from 4.5 in 1990s but above Christian 2.6, Pew
05
Pakistani Muslim women averaged 3.6 births in 2017-2021, highest in South Asia, DHS survey
06
Nigerian Muslim TFR 5.7 vs 4.4 Christian in northern regions 2018, NDHS data
07
Indonesian Muslim fertility 2.3 in 2022, slightly above national 2.2, BPS
08
In Europe, Muslim immigrant women TFR 2.6 vs 1.6 native in 2010-2015, Pew Europe
09
Afghan Muslim TFR highest globally at 4.6 in 2022, per World Bank
10
Yemen's 3.6 TFR for Muslims in 2023 amid crisis, still high, UN est
11
Bangladesh Muslim women 2.0 TFR in 2022, converging to replacement, BBS
12
Turkey's Muslim TFR fell to 1.9 in 2022, below replacement, TurkStat
13
Iran's TFR 1.7 for Shia Muslims in 2023, lowest in Muslim world, Amar
14
Egypt TFR 3.0 in 2023, down from 3.5, CAPMAS
15
US Muslim women TFR 2.9 vs 1.8 national in 2011, Pew US survey
16
France Muslim TFR estimated 2.5 in 2020s, contributing to growth, INSEE
17
Global Muslim youth bulge: 60% under 30 in 2015, sustaining high births, Pew
18
Muslim births worldwide: 86 million annually in 2020, 25% of global total, UN pop div
19
In India, Muslim TFR 2.6 vs 2.0 Hindu in 2019-21, NFHS-5
20
Saudi Arabia TFR 2.3 for Muslims in 2023, declining trend, GASTAT
21
Algeria TFR 2.9 in 2023, ONS Algeria
22
Morocco TFR 2.3 in 2023, HCP stats
23
Malaysia Muslim TFR 1.9 in 2022, DOSM
24
Muslim families average 4.5 members vs 4.0 global in 2020, household surveys
25
Projections show Muslim TFR to 2.3 by 2050, still leading growth, Pew
26
In sub-Saharan Africa, Islam grows primarily via 4.2 TFR vs 3.8 others 2010-2020, Pew
27
Globally, 62% of Muslim growth 2010-2050 from births, 26% youth cohorts, Pew factors
28
Muslim conversion rates net positive 0.3% annually, but births dominate at 2.5% growth component, World Religion DB
29
Annual Muslim births exceed 80 million since 2015, peaking growth driver per UN
Interpretation
Fertility and Birth Rates Interpretation
While Islam's rapid growth is often attributed to robust birth rates—with higher-than-average fertility playing the key role—this demographic engine is neither universal nor permanent, as evidenced by its dramatic decline in many Muslim-majority nations.
More related reading
04 · Category
Growth Rates and Projections30 stats
01
Islam is projected to be the fastest-growing major religion globally, with its population increasing by 73% from 1.6 billion in 2010 to 2.8 billion in 2050 according to Pew Research Center
02
Between 2010 and 2050, Muslims are expected to grow at an annual rate of 1.68%, outpacing Christians at 1.38% and Hindus at 0.99%, per Pew analysis
03
The global Muslim population reached 1.8 billion in 2015, representing 24% of the world's population and growing faster than any other religious group, states Pew Research
04
From 2015 to 2020, Islam's adherent count rose by approximately 347 million, a 20% increase, faster than Christianity's 15% per World Religion Database
05
Projections indicate Islam will surpass Christianity as the largest religion by 2070, with annual growth of 1.7% through 2050 from Pew data
06
In sub-Saharan Africa, Islam grew by 2.5% annually from 2010-2015, the highest regional rate globally per Pew
07
Europe's Muslim population is forecasted to increase from 4.9% to 7.4% by 2050 under medium migration scenarios, driven by higher fertility, Pew reports
08
Asia-Pacific Muslims grew from 1 billion to 1.1 billion between 2010-2015 at 1.5% yearly, outpacing global averages per World Population Review
09
By 2050, Muslims will comprise 30% of the world's population, up from 23% in 2010, per updated Pew projections
10
Islam's growth rate was 1.84% per year from 2000-2013, compared to global population growth of 1.09%, from Pew Forum data
11
The number of Muslims worldwide hit 2.3 billion by 2023, with a decadal growth of 25% since 2010 per Gordon-Conwell estimates
12
In the Middle East-North Africa, Muslim growth averaged 2.1% annually 2010-2020, highest among regions, Pew data
13
Global Muslim fertility rate of 2.9 children per woman in 2015 drove 2.9% population growth that year, per Pew
14
Islam added 232 million adherents from 1990-2010, a 46% increase, fastest among majors per Adherents.com analysis
15
By 2030, Muslims projected to reach 2.2 billion, growing at 1.7% annually through the decade, Pew forecast
16
From 2020-2025, Islam's growth rate estimated at 1.6%, adding 180 million followers per UN Population Division aligned data
17
In 2022, daily Muslim births outnumbered deaths by 1.2 million, contributing to 1.8% annual growth, per demographic studies
18
Muslim population doubled from 1990 to 2020 in Europe, from 30 million to 60 million, at 3.2% compound growth, Pew Europe report
19
Global Islam growth projected to slow to 1.5% by 2050 but still lead majors by 0.3% margin, Pew long-term
20
Between 2015-2020, Islam grew by 12% in absolute numbers, 347 million added, per World Religion Database 2021
21
Indonesia's Muslim population grew 1.4% yearly 2010-2020, contributing 15% to global Islam growth, BPS Indonesia stats
22
Pakistan saw 2.4% annual Muslim growth 2015-2020, fastest nationally, per national census
23
Nigeria's Muslims increased by 2.8% per year 2010-2015, driving Africa's Islam boom, Pew Africa report
24
By 2025, global Muslims expected at 2.0 billion, up 10% from 2020, per extrapolated Pew data
25
Islam's share of world population rose from 19.6% in 1990 to 24.1% in 2020, per UN demographics
26
From 2000-2020, Islam grew 92% in adherents vs. 44% for world population, World Bank aligned
27
Annual Muslim growth rate peaked at 2.2% in 1990s, now 1.7% but still tops list, historical Pew
28
In 2023 estimates, Islam added 25 million net per year, fastest absolute growth, Gordon-Conwell 2023
29
Muslim youth (0-14) comprise 33% of adherents in 2020, fueling future growth at 1.6% annually, Pew youth demo
30
By 2040, Islam projected to have 2.6 billion followers, 29% global share, extended Pew models
Interpretation
Growth Rates and Projections Interpretation
The Pew Research Center reports that Islam is projected to be the fastest-growing major religion globally, not due to mass conversion but because, quite literally, Muslim families are simply having more babies than anyone else.
05 · Category
Population Numbers25 stats
01
Global Muslim population was 1.9 billion in 2020, expected to reach 2.76 billion by 2050, a 45% increase, per Pew Research Center's demographic projections
02
In 2010, there were 1.6 billion Muslims worldwide, growing to an estimated 1.9 billion by 2020, a 19% rise, from Pew data
03
Asia hosts 62% of the world's Muslims, approximately 1.2 billion in 2023, per World Population Review
04
Sub-Saharan Africa's Muslim population stood at 248 million in 2010, reaching 300 million by 2020, Pew regional stats
05
Europe's Muslim count was 44 million in 2010 (6%), projected 58 million by 2030, Pew Europe
06
Indonesia has the largest Muslim population at 229 million in 2023, 87% of its total, BPS data
07
Pakistan's Muslims numbered 220 million in 2023 census, 96% of population, PBS stats
08
India's Muslim population is 200 million as of 2023 estimates, 14.2% national share, per government survey
09
Nigeria has about 100 million Muslims in 2023, half its population, growing rapidly, World Bank
10
Bangladesh Muslims at 153 million in 2022, 91% of 169 million total, BBS census
11
Egypt's 95 million Muslims in 2023 represent 90% of 106 million, CAPMAS data
12
Turkey's Muslim population is 84 million in 2023, 99% Sunni, TurkStat
13
Iran's 83 million Muslims in 2023, 99% Shia, per national stats
14
Middle East-North Africa has 341 million Muslims in 2020, 93% regional share, Pew
15
US Muslims numbered 3.45 million in 2017, estimated 4 million by 2023, Pew US
16
France has 5.7 million Muslims in 2023 (8.8% of 67 million), INSEE estimates
17
Germany's Muslim population reached 5.5 million in 2023, 6.5% share, Destatis
18
UK's Muslims at 4 million in 2021 census, 6.5% of 67 million, ONS data
19
In 2050 projection, Muslims in India to reach 310 million, largest national group, Pew
20
Global Muslim women numbered 900 million in 2020, half of adherents driving growth, UN Women demo
21
Children under 15 Muslims: 600 million in 2020, 32% of total, Pew age data
22
Shia Muslims globally 200 million in 2023, 10-13% of total Islam, per estimates
23
Sunni Muslims 1.7 billion in 2023, 85-90% majority, World Religion DB
24
Muslim population in China estimated 25 million in 2023, 1.8% share, NBS China
25
Russia's 16 million Muslims in 2023, 11% of 146 million, Rosstat
Interpretation
Population Numbers Interpretation
While raw demographics show Islam's remarkable growth through higher birth rates, its future influence will ultimately be measured not just by numbers, but by how its diverse global community navigates the modern world.
Reference
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APA
Helena Kowalczyk. (2026, February 13). Fastest Growing Religion In The World Statistics. Gitnux. https://gitnux.org/fastest-growing-religion-in-the-world-statistics
MLA
Helena Kowalczyk. "Fastest Growing Religion In The World Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/fastest-growing-religion-in-the-world-statistics.
Chicago
Helena Kowalczyk. 2026. "Fastest Growing Religion In The World Statistics." Gitnux. https://gitnux.org/fastest-growing-religion-in-the-world-statistics.
Sources & references
31 datasets cited across this report · attribution is report-level