
Catholicism is the largest religious body in 36 US states, with approximately 22% of the population of the United States following the religion, making it the largest religious denomination in the country. The number of Catholics in the US has been increasing, with a rise of 2 million people in the last 10 years. This growth has been concentrated in the South, which now has more Catholics than any other region. The states with the highest percentage of Catholics are Rhode Island (42-44%), Massachusetts (34%), and New Jersey (34%). The number of Catholics has also been increasing in the West, with states such as Florida and Arizona experiencing significant growth in their Catholic populations.
| Characteristics | Values |
|---|---|
| Percentage of Catholics in the US population | 22% (2017), 23% (2018), 18.7% (2020) |
| Number of Catholics in the US | 77.4 million (2017), 81.6 million (2015), 68.1 million (2015), 61.9 million (2020) |
| State with the highest percentage of Catholics | Rhode Island (42%) |
| States with the highest number of Catholics | New Mexico and Texas (along the Rio Grande) |
| States with above-average Catholic representation | Connecticut, Massachusetts, New Jersey, New York, New Hampshire, Illinois, California, Wisconsin |
| States with the lowest percentage of Catholics | Alabama (6%) |
| States with a decline in Catholic worshippers | Illinois, Northeast, Midwest |
| States with an increase in Catholic population | Southern states, Florida, Arizona, West |
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What You'll Learn
- Rhode Island is the state with the largest Catholic population at 42%
- Catholicism is the largest religious body in 36 US states
- The number of practicing Catholics increased from 2010 to 2020, despite a decline in churches
- The US has the fourth-largest Catholic population in the world
- The Catholic population in the US has grown by about 2 million in 10 years

Rhode Island is the state with the largest Catholic population at 42%
Rhode Island has the highest percentage of Catholic residents of any state in the United States, with 42% of the population identifying as Catholic as of 2022. This percentage equates to roughly 260,000 people in absolute terms, out of a total state population of just over one million. This concentration of Catholics in Rhode Island is notable and sets the state apart in terms of religious demographics.
Several factors have contributed to Rhode Island's significant Catholic population. Historically, the state has a long and deep-rooted association with Catholic traditions and institutions. The first Catholic mass in Rhode Island was held in 1635, and the state is home to the country's oldest continuously operating Catholic parish, St. Mary's on the Bay, founded in 1639. The establishment of early Catholic communities and the subsequent development of churches, schools, and other institutions have played a pivotal role in shaping the religious landscape of the state.
Immigration patterns have also had a significant impact on the growth of the Catholic population in Rhode Island. The state has a long history of welcoming immigrants, particularly those of Irish, Italian, and French-Canadian descent, many of whom were Catholic. These immigrant communities helped to establish and strengthen Catholic parishes and schools, contributing to the robust Catholic presence in the state today. The strong sense of community and social support within the Catholic Church may also have attracted immigrants seeking a familiar cultural environment and a supportive network during their transition to a new country.
Additionally, the proximity of Rhode Island to other New England states with substantial Catholic populations, such as Massachusetts and Connecticut, may have influenced the religious demographics of the region as a whole. The close geographic distance may have encouraged the establishment of Catholic institutions that serve the wider region, and the movement of Catholic individuals and families between these states may also be a contributing factor.
The large Catholic population in Rhode Island has had a significant impact on the cultural and social fabric of the state. Catholic traditions and values are interwoven into the state's heritage and are expressed through various festivals, parades, and community events. Catholic schools and universities, known for their academic excellence and religious education, are also an integral part of the education landscape in Rhode Island, serving students from a range of religious and cultural backgrounds.
Moreover, the Catholic community in Rhode Island is actively involved in charitable works and social services. Catholic charities and organizations provide crucial support to those in need, offering a range of programs and services to assist the homeless, the elderly, and vulnerable families. These initiatives reflect the values of compassion and social justice that are central to Catholic teachings.
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Catholicism is the largest religious body in 36 US states
The number of Catholics in the US has been increasing, with a rise of about 2 million people in the past 10 years. This growth has been most significant in the South and West, with states along the southern border experiencing the largest influxes of Catholics. For example, Florida's Catholic population rose from 14.6% in 2010 to 21.3% in 2020, and in Arizona, the Catholic population increased from 14.6% to 21.3% during the same period. The Northeast and Midwest, historically Catholic strongholds, have seen a decline in the number of Catholic congregants in recent years.
The distribution of Catholics in the US is influenced by historical patterns of migration, with states that have seen a large-scale migration of Catholics, such as Rhode Island, having a higher Catholic population. Rhode Island is the state with the largest population of Catholic residents, with 42% of the state's population identifying as Catholic, followed by Massachusetts (34%) and New Jersey (34%). The high percentage of Catholics in Rhode Island can also be attributed to the state's low number of non-Catholic settlers compared to other states in the region.
The growth of Catholicism in the US is also impacted by the country's acquisition of predominantly Catholic territories, such as the former possessions of Mexico, which included states like California, New Mexico, and Texas. Additionally, the higher population of Hispanics, who have the most common religious identity as Catholics, has contributed to the expansion of Catholicism in certain states.
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The number of practicing Catholics increased from 2010 to 2020, despite a decline in churches
Catholicism is the largest religious denomination in the United States, with approximately 77.4 million members as of 2017. This accounts for about 22% of the population. The number of practicing Catholics increased from 2010 to 2020, despite a decline in the number of churches. In 2020, there were 19,405 Catholic churches, 1,000 fewer than a decade earlier.
The growth in the number of Catholics is most notable in the South and West, with a 6 million increase in the Catholic population in these regions over the decade. States along the southern border, such as Florida and Arizona, have seen some of the largest influxes of Catholics. In Florida, the Catholic population rose from 14.6% in 2010 to 20% in 2020, with a similar increase in Arizona, where Catholics now make up 21.3% of the population. This shift towards the South and West breaks from historical patterns, as previously, the Northeast and Midwest were the strongholds of Catholicism in the US.
The growth in the number of Catholics in the South and West can be attributed to several factors. One significant factor is the higher population of Hispanics, who predominantly identify as Catholic. Immigration has also played a crucial role in the growth of Catholicism in these regions, with an influx of immigrants from Catholic regions, including Latin America, Poland, and Italy.
While the number of practicing Catholics is on the rise, the Catholic Church continues to face challenges. The decline in the number of churches is partly due to the financial repercussions of clergy sexual abuse scandals, which have impacted the Church's reputation and led to a decrease in followers in certain regions, such as Pope Leo XIV's home state of Illinois. Despite these challenges, the Catholic Church remains a significant force in the United States, with a diverse and growing congregation.
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The US has the fourth-largest Catholic population in the world
The United States is home to the fourth-largest Catholic population in the world, with Brazil, Mexico, and the Philippines taking the top spots. In the US, about 22-25% of the population identifies as Catholic, making it the country's second-largest religious grouping after Protestantism. This equates to approximately 77.4 million members as of 2017, according to some sources, while others state 61.9 million in 2020 and 81.6 million in 2015. The Catholic population has been increasing by 3-6% each decade since 1965, and it is the most diverse in terms of race and ethnicity, with Hispanics accounting for 38% of US Catholics.
Catholicism is the largest religious body in 36 US states, and it is growing fastest in the South and West, particularly in states along the southern border. Florida, for example, has seen its Catholic population rise from 14.6% in 2010 to 21.3% in 2020, with one in five Floridians now identifying as Catholic. In Arizona, the Catholic population increased from 14.6% to 21.3% during the same period. The average congregation size in Florida is 7,000, while in Nevada, it is over 10,000. This growth in the South and West has been accompanied by a decline in the Northeast and Midwest, which were historically Catholic strongholds.
The distribution of Catholics in the US is influenced by historical migration patterns and the higher population of Hispanics, whose most common religion is Catholicism. States with large Catholic populations in the past, such as Rhode Island (42%) and Massachusetts (34%), can attribute this to the influx of immigrants from Catholic regions like Latin America, Poland, Quebec, Ireland, Portugal, and Italy. However, the Northeast and Midwest regions are now seeing a decline in the number of congregations and congregants, with the number of Catholic churches in 2020 being 1,000 fewer than a decade earlier.
Despite the overall growth in the Catholic population, the number of churches has decreased. This has resulted in larger congregations, with an average of 3,000 adherents per congregation for Catholics, which is unusually high compared to other religious groups. This trend is attributed to financial repercussions from sexual abuse scandals within the Church. Nevertheless, the Catholic Church in the US continues to have a significant cultural, social, and political impact on the country.
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The Catholic population in the US has grown by about 2 million in 10 years
The US has the fourth-largest Catholic population in the world, with approximately 77.4 million members as of 2017. As of 2018, 23% of the population identified as Catholic, making it the second-largest religious grouping after Protestantism. A 2020 Gallup poll reported a similar figure, with 25% of Americans identifying as Catholic. However, the number of churches has declined, with 1,000 fewer Catholic churches in 2020 than a decade earlier.
The growth in the Catholic population is most notable in certain states, particularly those along the southern border. Florida's Catholic population rose from 14.6% in 2010 to 21.3% in 2020, with one in five Floridians now professing the Catholic faith. Arizona also experienced a significant increase during this period, with the share of Catholics rising from 14.6% to 21.3%. The average congregation size in Florida is 7,000 regular worshippers, while in Nevada, it exceeds 10,000.
Rhode Island is the state with the largest Catholic population, with 42% of residents identifying as Catholic. Other states with high Catholic populations include Massachusetts (34%), New Jersey (34%), Connecticut, New York, New Mexico, Illinois, California, and Wisconsin. The distribution of Catholics across the US is influenced by historical migration patterns, with states like Massachusetts having a large influx of Catholic immigrants from Latin America, Poland, Quebec, Ireland, Portugal, and Italy.
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Frequently asked questions
Rhode Island has the highest number of Catholics in the US, with 42% of the state's population identifying as Catholic.
Catholics make up 20-25% of the US population, or approximately 68.1 million to 81.6 million people.
States along the southern border have seen some of the largest influxes of Catholics. Florida's Catholic population rose by 5.6% from 2010 to 2020, and Arizona's share of Catholics increased from 14.6% in 2010 to 21.3% in 2020.
Catholics are spread out relatively evenly across the US, with 29% in the South, 26% in the Northeast, 25% in the West, and 20% in the Midwest.











































