
Catholicism is the largest religious body in 36 US states, with the single-largest religious group being Catholics, who number 61.9 million or 18.7% of the population. The most Catholic state in the US is Rhode Island, with 42% of the state's population identifying as Catholic. This is due to the high population of French-Canadian, Irish, Italian, Hispanic, and Portuguese immigrants. The second-highest Catholic population is in Massachusetts, with 34% of the population identifying as Catholic, predominantly due to the influx of immigrants from Catholic regions or countries.
| Characteristics | Values |
|---|---|
| Most Catholic State | Rhode Island |
| % of Rhode Island Population that is Catholic | 42% |
| Second Most Catholic State | Massachusetts |
| % of Massachusetts Population that is Catholic | 34% |
| Third Most Catholic State | New Jersey |
| % of New Jersey Population that is Catholic | 34% |
| US Catholic Population | 61.9 million |
| % of US Population that is Catholic | 18.7% |
| US Catholic Population in 2014 | 81.6 million |
| % of American Adults Raised Catholic | 31.7% |
| % of American Catholics that No Longer Identify as Catholic | 41% |
| Largest Catholic Population of English Speakers | The US |
| US Catholic Population Growth in the Last Decade | 2 million |
| Fastest Growing Catholic Population in the US | The South and West |
| % of Catholics in the US that are Hispanic | 38% |
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What You'll Learn

Rhode Island is the most Catholic state
The large Catholic population in Rhode Island has had an impact on the culture and demographics of the state. For example, there are well-organized branches of the Catholic Federation in each county, providing a sense of community and support for Catholics in the area. The Catholic Church in Rhode Island is also known for its poetic elements, including stories, imagery, and rituals, that have helped to keep its followers engaged and connected to their faith.
While Rhode Island currently has the highest percentage of Catholic residents, other states have also had significant Catholic populations throughout history. For example, Massachusetts, which currently has the second-highest Catholic population at 34%, has a long history of Catholicism. The establishment of missions by Spanish and French missionaries in the 16th and 17th centuries, as well as the influence of Catholic immigrants from countries like Latin America, Poland, Quebec, Ireland, Portugal, and Italy, have all contributed to the strong Catholic presence in Massachusetts.
The Catholic Church in the US as a whole is known for its diversity in terms of race and ethnicity. It is the most diverse religious organization in the country, with Hispanics accounting for 38% of Catholics and Blacks and Asians each making up 3%. This diversity is a result of the Church's inclusive nature, welcoming immigrants and people from various cultural backgrounds.
While Catholicism is the largest religious body in 36 US states, its geographical distribution is changing. While it used to be more concentrated in the Northeast and Midwest, it is now growing fastest in the South and West. Despite these shifts, Rhode Island remains the state with the highest proportion of Catholic residents, reflecting the strong and enduring presence of the Catholic faith in the state.
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Catholicism is the largest religious body in 36 states
Catholicism is the largest religious body in 36 US states, with the highest number of Catholics found in the South. The South has experienced the most growth in Catholicism over the past decade, with the number of US Catholics increasing by 3 to 6% each decade since 1965. This growth is attributed to the influx of immigrants from Catholic countries and regions, such as Latin America, Poland, Quebec, Ireland, Portugal, and Italy.
Rhode Island is the most Catholic state in the US, with 42% of its population identifying as Catholic. This is followed by Massachusetts, New Jersey, and New Mexico, each with approximately 34% of their populations identifying as Catholic. The high percentage of Catholics in Rhode Island is partly due to the historical presence of French-Canadian, Irish, and Italian immigrants, as well as the more recent establishment of Hispanic and Portuguese communities.
The history of the Catholic Church in the US dates back to the 16th and 17th centuries, with the arrival of Spanish and French missionaries. Spanish missionaries established several missions in the present-day western US, while New Orleans was the most important French colony in terms of Catholicism. The Catholic population in the US is ethnically diverse, with Hispanics accounting for 38%, and blacks and Asians each representing 3%.
While Catholicism is the largest single religious group in the US, Protestants collectively outnumber Catholics. The impact of Catholicism is also evident in certain regions, such as Dearborn, Michigan, which has a significant Muslim population, and California, where Mexican restaurants offer Lenten menus catering to Catholic traditions.
Catholicism in the US has faced controversies, including the sharp decline in weekly Mass attendance between 1968 and 1975, attributed to the papal encyclical upholding the Catholic ban on contraception. Additionally, allegations of clerical child abuse and episcopal negligence have impacted the Catholic Church in recent years. Despite these challenges, Catholicism has thrived in America's pluralism, and it continues to be a significant religious presence in the country.
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Catholics are the single-largest religious group in the US
Catholicism is the largest religious body in 36 US states, with the data showing that Catholicism is growing fastest in the South and West, even as it declines in the Midwest and Northeast. According to the 2020 US Religion Census, there were 61.9 million Catholics in the US, about 18.7% of the population. While Protestants collectively outnumber Catholics in the US, researchers of the US Religion Census viewed various Protestant bodies as their own denominational groups, not collectively. According to this categorization, Catholics are the single-largest religious group in the US.
The US is home to the world's fourth-largest Catholic population, after Brazil, Mexico, and the Philippines. The country also has the largest Catholic population of English speakers and the largest population of Catholic minorities. The history of the Catholic Church in the US dates back to the 16th and 17th centuries following the arrival of Spanish and French missionaries. A number of missions were established by the Spanish in what is now the present-day western US, while New Orleans was the most important colony to the French. The Catholic population in the US has grown by about 2 million people in the past 10 years, with much of that growth concentrated in the South. Today, the South has more Catholics than any other region.
Rhode Island is the most Catholic state in the US, with 42% of the state's population identifying as Catholic. The high number of Catholics in Rhode Island is due to the large population of French-Canadian, Irish, and Italian immigrants in the past. In recent times, significant numbers of Hispanics and Portuguese have also settled in the state. The state of Massachusetts is second, with 34% of its population identifying as Catholic, due to an influx of immigrants from Catholic regions or countries, mainly Latin America, Poland, Quebec, Ireland, Portugal, and Italy. New Jersey is the third most Catholic state, with 34% of its population, or about 500,000 people, identifying as Catholic.
The Catholic Church in the US is the most diverse in terms of race and ethnicity, with Hispanics accounting for 38% of Catholics and blacks and Asians at 3% each. The Church represents the most multi-ethnic organization of any kind within the nation's borders, providing a major laboratory for cross-cultural cooperation and communication. While the number of Catholic congregations has declined in recent years, the average number of adherents per congregation is 3,000 for Catholics, an unusually high number compared to other groups.
Catholics differ from other Americans in their tendency to think in "sacramental" terms, imagining God as present in a world that was revelatory rather than bleak. The poetic elements of Catholic tradition—its stories, imagery, and rituals—keep most Catholics in the fold, whatever their disagreements with church discipline or doctrine. While the Catholic Church in the US became the subject of controversy in the late 20th century due to allegations of clerical child abuse, it continues to thrive in America's pluralism.
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New Jersey is the third most Catholic state
The US is home to the world's fourth-largest Catholic population, after Brazil, Mexico, and the Philippines. It also has the largest Catholic population of English speakers. Catholicism is the largest religious body in 36 US states, and the religion is growing fastest in the South and West. In 2020, there were 61.9 million Catholics in the US, about 18.7% of the population.
The Catholic Church in the US is notably diverse in terms of race and ethnicity, with Hispanics accounting for 38% of Catholics and blacks and Asians each making up 3%. This diversity is reflected in New Jersey, which has a large Jewish population in certain parts of the state.
While the number of US Catholics has increased by 3 to 6% each decade since 1965, weekly Mass attendance saw a sharp decline between 1968 and 1975, largely attributed to the papal encyclical upholding the Catholic ban on contraception. In recent years, there has been a decline in the Northeast and Midwest, with 45% of Catholics living in these regions in 2020, compared to 71% fifty years ago.
Despite some fluctuations and uncertainties about the future of Catholicism in the US, New Jersey remains a notably Catholic state, contributing to the religious landscape of the nation.
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Catholics in Massachusetts are progressive
Catholicism is the largest religious body in 36 US states, with 61.9 million Catholics in the country as of 2020, or about 18.7% of the population. Rhode Island is the most Catholic state in the US, with 42% of its population identifying as Catholic. The state of Massachusetts has the second-highest Catholic population, with 34% of its population identifying as Catholic. This is predominantly due to the influx of immigrants from Catholic regions or countries, such as Latin America, Poland, Quebec, Ireland, Portugal, and Italy. Massachusetts has a large Portuguese population in Fall River and Cape Cod, initially drawn by the whaling industry and later by the fishing industry. Similarly, French Canadians were drawn in large numbers to the textile mill towns of Holyoke, Lowell Worcester, and Fall River after the Civil War. Italian immigration to Boston, the capital of Massachusetts, began in the 1860s, with major immigration taking place from the 1890s to the early 1900s, primarily from southern Italians fleeing poverty. In addition, Polish immigrants arrived in Massachusetts around the same time, fleeing poverty and Russian persecution, and settling in western Massachusetts in the Connecticut River Valley.
Massachusetts has also seen populations of Puerto Ricans, Dominicans, and other Latin American and Caribbean communities arrive in its large cities, as well as in old mill towns. These communities were drawn to Massachusetts for better economic opportunities or to escape civil war and violence in their home countries. The progressive nature of Catholics in Massachusetts can be attributed to the diverse and inclusive nature of the Catholic Church in the US, which represents the most multi-ethnic organization of any kind within the nation's borders. The poetic elements of the Catholic tradition, including its stories, imagery, and rituals, have also played a role in keeping Catholics in the fold, despite their disagreements with particular aspects of church discipline or doctrine.
The Catholic Church in the US has competed happily in the country's pluralism, thriving as the largest Catholic population of English-speakers in the world. While the future of Catholicism in the US is uncertain, with a sharp decline in weekly Mass attendance between 1968 and 1975 due to the papal encyclical upholding the Catholic ban on contraception, the number of US Catholics has increased by 3 to 6% each decade since 1965. This growth is concentrated in the South, which now has more Catholics than any other region. Despite the uncertainties, Catholics in Massachusetts are progressive, embracing diversity and inclusion, and contributing to the growth of Catholicism in the US.
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Frequently asked questions
Rhode Island is the most Catholic state in the US with 42% of the state's population identifying as Catholic.
According to a 2020 survey, there were 61.9 million Catholics in the US, about 18.7% of the population. However, another source states that 81.6 million Americans identify as Catholic.
The state with the second highest Catholic population is Massachusetts with 34% of the population identifying as Catholic. New Jersey is the third most Catholic state, with 34% of the population identifying as Catholic.











































