
Chicago is known for its magnificent late 19th and early 20th-century Catholic churches, many of which were funded by poor immigrants working in the city's factories and steel mills. The Catholic population of Chicago nearly quadrupled between 1880 and 1902, reaching 800,000, largely due to immigration. By the 1920s, almost half of Chicago's population was Catholic. Today, Chicago is the second-most Catholic city in the US, with 33% of residents identifying as Catholic. The Archdiocese of Chicago serves over 2 million Catholics in Cook and Lake counties, covering an area of 1,411 square miles (3,650 km2). However, the number of Catholics as a proportion of the population has been declining, with Cook County having fewer than 2 million Catholics for the first time in decades.
| Characteristics | Values |
|---|---|
| Year Chicago became an Archdiocese | 1880 |
| No. of Catholics in Chicago in 1880 | 800,000 |
| No. of Catholics in Cook County in 1952 | Under 2 million |
| No. of Catholics per thousand in Cook County in 1971 | 438.7 |
| No. of Catholics per thousand in Cook County in 1980 | 438.5 |
| No. of Catholics per thousand in Cook County in 1990 | 415.5 |
| No. of Catholics per thousand in Cook County in 2000 | 399.3 |
| No. of Catholics per thousand in Cook County in 2010 | 374.8 |
| No. of Catholics in Cook County in 2012 | Under 2 million |
| No. of Catholics in Chicago in 2022 | 2.2 million |
| % of Chicago residents who are Catholic | 33% |
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What You'll Learn

Chicago's Catholic population growth
Chicago is known for its magnificent late 19th and early 20th-century Catholic churches, many of which were funded by poor immigrants working in the city's factories and steel mills. The Catholic population of Chicago grew rapidly in the late 19th century, nearly quadrupling between 1880 and 1902 to 800,000. This growth was driven primarily by immigration, with existing Irish and German Catholic communities expanding and new arrivals bringing their own languages and cultural traditions. During this period, 52 new national parishes were founded to serve particular ethnic communities.
By the 1920s, almost half of Chicago's population was Catholic, and the Archdiocese of Chicago established schools serving Germans, Poles, Italians, Mexicans, and various other ethnic groups. The Archdiocese of Chicago, which encompasses Cook and Lake Counties, currently serves over 2 million Catholics across an area of 1,411 square miles. However, the Catholic population in Cook County has declined in recent decades, falling below 2 million for the first time in decades. This decrease is attributed more to urban-rural migration than a loss of faith, as collar counties and other regions have experienced significant growth in their Catholic populations.
Despite the overall decline in religious affiliation, Chicago remains one of the most Catholic cities in the United States. According to a 2014 study by the Public Religion Research Institute, 33% of Chicago residents identified as Catholic, tying with Philadelphia as the second-most Catholic city in the country.
While Chicago's Catholic population has decreased, the number of Catholic institutions has also been significantly impacted. Since 1965, two-thirds of Catholic schools in the Archdiocese have closed, and over one-third of Catholic parishes have been permanently shut down. Demographic changes and urban-rural migration patterns have contributed to these closures, and the future of Catholicism in Chicago faces challenges due to declining church attendance, a decreasing number of religious clergy, and a significant increase in Catholics leaving the faith.
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Catholic immigration to Chicago
Chicago has a large Catholic population, with over 2 million Catholics in Cook and Lake Counties as of 2014. The Catholic population in Chicago has historically been high, with almost half the population being Catholic by the 1920s. The Archdiocese of Chicago, established in 1880, has played a significant role in serving and educating the Catholic population.
The growth of the Catholic population in Chicago is largely attributed to immigration. During the 19th and early 20th centuries, the Archdiocese of Chicago experienced a wave of Catholic immigration, with existing Irish and German communities expanding and new arrivals from Poland, Bohemia, France, Italy, Croatia, Slovakia, Lithuania, and the Netherlands. This diversity led to the establishment of national parishes within the archdiocese, providing cultural and linguistic support to these immigrant communities.
The Catholic Church in Chicago established schools serving various ethnic groups, including Germans, Poles, Czechs, Italians, and Mexicans. These schools were often built and operated by religious sisters, providing education to Catholic children within their respective communities. The languages of instruction in these schools were often German or Polish, reflecting the significant presence of these immigrant groups within the Catholic population.
The impact of Catholic immigration on Chicago's demographics and cultural landscape has been significant. The establishment of parishes and schools by the Archdiocese of Chicago helped create a sense of community and preserved cultural traditions among immigrant Catholics. Additionally, the Catholic Church in Chicago has been vocal about social issues, including opposition to mass deportation policies and support for undocumented immigrants, reflecting the Church's involvement in the city's social and political landscape.
While the Catholic population in Cook County has decreased in recent years, it still maintains a strong presence in the region. The decline in numbers may be attributed to suburbanization, as nearby counties have experienced an increase in their Catholic populations. Overall, Chicago continues to have a significant Catholic population, influencing the cultural, social, and educational landscape of the city.
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Catholic schools in Chicago
Chicago has a large Catholic population, which nearly quadrupled between 1880 and 1902, reaching 800,000. This was largely due to immigration, with Polish, Bohemian, French-Canadian, Lithuanian, Italian, Croatian, Slovak, and Dutch Catholics arriving in the Archdiocese. By the 1920s, almost half of Chicago's population was Catholic.
The Archdiocese of Chicago operates a system of primary and secondary schools, which is the largest private school system in the United States. The first school in the Archdiocese was a boys' school, opened in Chicago in 1844. During the 19th and early 20th centuries, the Archdiocese established schools serving various ethnic groups, including Germans, Poles, Czechs, Bohemians, French, Slovaks, Lithuanians, Puerto Rican Americans, African Americans, Italians, and Mexicans. Many of these schools were founded by religious sisters.
The school construction boom ended when Cardinal John Cody decided to limit the construction of Catholic schools in Lake County and suburban areas in Cook County. Between 1984 and 2004, the Archdiocese closed 148 schools and 10 school sites. By 2005, over half of its urban schools had closed.
As of 2020, the Archdiocese ran 160 elementary schools and three high schools. Additionally, there are eight Catholic elementary schools and 28 Catholic high schools that are not run by the Archdiocese but are located within it. This includes seven all-girl high schools, seven all-boys high schools, and 19 co-ed high schools.
Some notable Catholic schools in Chicago include:
- St. Ethelreda School
- St. Gabriel School
- St. Jerome School
- St. John de la Salle Academy of Fine Arts
- St. Margaret of Scotland School
- St. Michael School
- St. Philip Neri School
- St. Sabina Academy
- St. Therese Chinese Catholic School St. Barbara Campus
- St. Thomas the Apostle School
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Catholic church closures in Chicago
Chicago has a large Catholic population, which nearly quadrupled to 800,000 between 1880 and 1902, mainly due to immigration. By the 1920s, almost half of Chicago's population was Catholic. The city's Catholic population continued to grow into the 21st century, reaching over 2 million in Cook County in 2012. However, this number has declined in recent years, with Cook County falling below 2 million Catholics for the first time in decades in 2021. This decrease is attributed to urban residents moving to other counties, as the collar counties surrounding Cook have seen significant increases in their Catholic populations.
The Archdiocese of Chicago has been forced to close Catholic churches in the city, with a particular impact on Black Catholic parishes. The reasons for these closures include a shortage of priests, declining parishioner enrollment, and costly repairs. The "'Renew My Church' program, a relatively new initiative by the Archdiocese, has resulted in the consolidation and closure of churches, with a disproportionate number of Black Catholic churches affected. Low attendance is cited as one of the main reasons for the closure of Black Catholic churches.
One example of a church closure is St. Matthias, which was selected for consolidation with Queen of Angels in Ravenswood due to a $4.6 million debt and a shrinking number of parishioners. The impact of church closures extends beyond the loss of an institution, as these sacred spaces often provide essential human services to families and individuals within their communities.
Preservation Chicago, an organization advocating for the preservation of Chicago's architectural heritage, has recommended that closed Catholic churches remain available for worship or be landmarked before being sold to protect their historical integrity and ties to the neighborhood. They express concern that many of the churches will be sold to developers looking to build luxury housing.
The Archdiocese of Chicago operates a system of primary and secondary schools, and between 1984 and 2004, they closed 148 schools and 10 school sites. In 2020, the Archdiocese announced its largest restructuring plan since Hurricane Katrina, with dozens of parishes merging and closing.
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Catholic population decline in Chicago
Chicago has long been associated with a substantial Catholic population. In the 1920s, almost half of the city's population was Catholic, and the Catholic population of Chicago quadrupled between 1880 and 1902, largely due to immigration. However, in recent decades, there has been a notable decline in the Catholic population of Chicago.
The Catholic population of Cook County, Chicago, fell below 2 million for the first time in decades in 2012. This decline is evident in the "adherence rate", which measures Catholics per thousand. In 1971, the adherence rate was 438.7, but by 2010, this had dropped to 374.8. Over the past 30 years, Cook County has lost 356,520 Catholics, although this can be partly attributed to suburbanization, as nearby counties have seen large increases in their Catholic populations.
The decline in the Catholic population of Chicago is also reflected in the closure of Catholic institutions. Since 1965, 390 Catholic schools have been closed in Chicago, with just 200 remaining. This means that two-thirds of all Catholic schools in the Archdiocese have been closed, and 95% of these closures have occurred since the Second Vatican Council. The number of parish closures is also significant, with over one-third of all Catholic parishes in the Archdiocese of Chicago permanently shut down.
The Archdiocese of Chicago has seen a massive decline, despite the optimism and strength of the American Church during the Second Vatican Council of the 1960s. The closures of Catholic institutions in Chicago continue, and if this trend persists, there will be no Catholic schools left in the city in the next 50 years, and most churches open today will be closed.
However, it is worth noting that Chicago remains one of the most Catholic cities in the United States. In 2014, 33% of Chicago residents identified as Catholic, the second-highest proportion of any major US metropolitan area, behind only Boston, New York, and Pittsburgh, which each had 36%.
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Frequently asked questions
Chicago is the second-most Catholic city in the U.S., with 33% of residents identifying as Catholic, according to a 2014 study. The Archdiocese of Chicago serves over 2 million Catholics in Cook and Lake counties, an area of 1,411 square miles (3,650 km2).
Chicago's Catholic population has fluctuated over time. From 1880 to 1902, the Catholic population of Chicago nearly quadrupled to 800,000, mainly due to immigration. By the 1920s, almost half of Chicago's population was Catholic. However, in recent decades, the number of Catholics in Cook County has decreased, falling below 2 million for the first time in decades.
Chicago is known for its magnificent late 19th and early 20th-century Catholic churches, many built with donations from poor immigrants. The Archdiocese of Chicago operates a system of primary and secondary schools, with over 200 remaining as of 2022.
There has been a general decline in Catholicism in Chicago, with closures of Catholic parishes and schools. Since 1970, weekly church attendance among Catholics has dropped from 55% to around 20%. However, demographic changes, such as the growth of Chicago's Hispanic community and Catholic immigration from countries like the Philippines, Vietnam, and Poland, may favor a renewal of Catholicism in the city.






































