Illinois: A Demographic and Electoral Profile

Illinois, known as the “Land of Lincoln,” occupies a central place in American political, industrial, and cultural history. Admitted to the Union in December 1818, Illinois grew rapidly during the nineteenth and early twentieth centuries as a center of agriculture, transportation, manufacturing, finance, and immigration. Today, Illinois remains one of the most economically and politically influential states in the Midwest, though it has also experienced significant demographic, industrial, and political transformation in recent decades.

With a population of approximately 12.8 million residents, Illinois ranks among the most populous states in the country. However, unlike many Southern and Western states, Illinois has experienced population stagnation and a slight decline during the past decade, making it one of only a few states to lose population between 2010 and 2023.

Politically, Illinois reflects the broader evolution of northern industrial states. Historically Republican during much of the period following the Civil War, Illinois shifted to the Democratic Party during the New Deal era under Franklin D. Roosevelt. The state later alternated between both parties during the postwar decades before becoming reliably Democratic in presidential elections beginning in the 1990s. In 2020, Joe Biden defeated Donald Trump by approximately 17 percentage points.

With 19 electoral votes, Illinois remains one of the largest electoral prizes in the Midwest, although it has gradually lost electoral influence due to slower population growth relative to Southern and Western states.

Geography and Population Distribution

Illinois covers approximately 57,914 square miles and contains a striking contrast between dense urban development in the northeast and largely rural agricultural regions throughout much of the state.

The overwhelming concentration of Illinois’s population lies within the greater Chicago metropolitan area. Chicago, the third-largest city in the United States, has nearly 2.8 million residents within its city limits and anchors a broader metropolitan region of nearly 10 million people that extends into neighboring Indiana and Wisconsin.

Cook County, home to Chicago, is one of the most populous counties in the nation.

Outside metropolitan Chicago, much of Illinois is rural or small-town in character. Of the state’s 102 counties, a large majority contain fewer than 50,000 residents. Agriculture remains economically and culturally significant throughout central and southern Illinois.

The state is one of America’s leading producers of:

• corn

• soybeans

• livestock

• agricultural commodities

The contrast between the urbanized Chicago region and the rural remainder of the state strongly shapes Illinois’s political and cultural divisions.

Demographic Composition

Illinois remains one of the more diverse states in the Midwest. According to recent demographic estimates, the racial composition is approximately:

• White: approximately 68%

• Black or African American: approximately 14%

• Asian: approximately 6%

• Hispanic and Latino populations: rapidly growing

• Two or more races: approximately 6%

• Native American and Pacific Islander populations: relatively small

Chicago and its suburbs contain particularly diverse populations, including:

• African American communities

• Mexican American and Puerto Rican populations

• South Asian communities

• Arab American populations

• Eastern European communities

• Chinese, Korean, Filipino, and Vietnamese populations

Illinois’s Black population played a central role in the Great Migration of the twentieth century, when millions of African Americans moved from the South to northern industrial cities such as Chicago.

The median age in Illinois is approximately 37.4 years, with women slightly outnumbering men statewide.

Religion and Social Identity

Religion remains influential in Illinois, although the state is more religiously and culturally pluralistic than many Southern or rural Midwestern states.

Religious affiliation estimates indicate:

• approximately 71% identify with Christian traditions

• A growing percentage identify with non-Christian religions

• A substantial proportion identify as religiously unaffiliated

Christianity remains dominant and includes:

• Roman Catholics

• mainline Protestants

• evangelical churches

• historically Black churches

• Orthodox Christian communities

Chicago has historically been one of the most important Catholic cities in the United States because of large Irish, Polish, Italian, and Latino populations.

Illinois is also home to substantial:

• Jewish communities

• Muslim communities

• Hindu and Sikh populations

• Buddhist organizations

• secular and humanist groups

The state’s diversity reflects generations of immigration and urbanization.

Muslims in Illinois

Illinois contains one of the largest Muslim populations in the United States. Although estimates vary, the Muslim population is believed to number several hundred thousand residents, with the overwhelming majority concentrated in the Chicago metropolitan area.

Muslim communities in Illinois include:

• South Asian Americans

• Palestinian and broader Arab American communities

• Bosnian Muslims

• African American Muslims

• Turkish Americans

• African immigrant populations

• converts from multiple backgrounds

Major Muslim population centers include:

• Chicago

• Bridgeview

• Naperville

• Skokie

• Lombard

• suburban Cook County

• DuPage County

Illinois contains some of the nation’s most established Islamic institutions, including:

• mosques

• Islamic schools

• civic organizations

• interfaith initiatives

• healthcare and charitable organizations

The Chicago region has long served as one of the most important centers of Muslim intellectual, educational, business, and civic life in North America.

Economy and Industrial Transformation

Illinois possesses one of the largest economies in the United States and has historically served as a central hub of American industrialization.

Major sectors of Illinois’s economy include:

• finance

• transportation and logistics

• manufacturing

• agriculture

• higher education

• healthcare

• technology

• food processing

• commodities trading

Chicago remains one of the world’s major financial and transportation centers and hosts institutions such as:

• Chicago Mercantile Exchange

• Chicago Board of Trade

The state also contains major universities, including:

• University of Chicago

• Northwestern University

• University of Illinois Urbana-Champaign

Despite its economic strengths, Illinois faces major challenges:

• pension debt

• population decline

• urban violence

• economic inequality

• deindustrialization in some regions

• Political polarization between Chicago and rural Illinois

State Legislature and Political Structure

Illinois operates through the Illinois General Assembly, consisting of:

• The Illinois Senate, with 59 members

• The Illinois House of Representatives, with 118 members

The Democratic Party currently controls both chambers of the legislature, reflecting the political dominance of the Chicago metropolitan region in statewide elections.

The legislature plays a major role in shaping:

• taxation

• labor policy

• criminal justice reform

• healthcare

• public education

• transportation

• environmental regulation

• immigration-related policies

Because of Illinois’s large urban population and union traditions, the state often adopts more progressive policies than neighboring Midwestern states.

AIPAC, Pro-Israel Advocacy, and Congressional Politics

Illinois also demonstrates the growing influence of national political action committees (PACs), lobbying organizations, and ideological advocacy networks in congressional elections.

Organizations such as AIPAC (American Israel Public Affairs Committee) maintain substantial influence within Illinois congressional politics.

Recent campaign finance tracking indicates major pro-Israel political expenditures in several Illinois congressional districts, including:

• IL-06 (Sean Casten): approximately $2.1 million

• IL-08 (Raja Krishnamoorthi): approximately $1.33 million

• IL-10 (Brad Schneider): approximately $3.77 million

Unlike some swing states where spending is concentrated mainly in competitive general-election races, Illinois presents a different pattern. Much of the largest pro-Israel spending appears within heavily Democratic districts, suggesting that political intervention often focuses on:

• intra-party influence

• ideological positioning

• shaping Democratic coalition politics

• reinforcing support for pro-Israel foreign policy positions

Illinois, particularly the Chicago metropolitan area, contains:

• large Jewish populations

• active progressive political organizations

• substantial Arab and Muslim communities

• strong labor and activist networks

As a result, debates surrounding:

• Israel and Palestine

• Gaza

• antisemitism

• Islamophobia

• campus activism

• progressive foreign policy

• Campaign financing

has become increasingly visible within Illinois politics.

Christian Zionist political influence exists in parts of downstate Illinois and evangelical communities, though it is generally less dominant than in Southern states.

Critics argue that heavy PAC involvement can disproportionately shape congressional politics and amplify the influence of wealthy donors. Supporters maintain that such organizations represent legitimate democratic advocacy concerning foreign policy and international alliances.

Urban-Rural Divides and Political Tensions

Illinois increasingly reflects sharp divides between:

• urban Democratic regions centered around Chicago

• conservative rural and small-town regions throughout central and southern Illinois

This divide influences debates over:

• taxation

• gun policy

• policing

• education

• immigration

• environmental policy

• public spending

Some rural residents argue that Chicago disproportionately dominates state politics, while urban communities emphasize the economic and demographic importance of the metropolitan region to the state’s overall prosperity.

Conclusion

Illinois remains one of the most historically important and economically influential states in the United States. Its industrial legacy, agricultural strength, financial institutions, educational centers, and cultural diversity continue to shape both the Midwest and the nation as a whole.

At the same time, Illinois reflects many of the broader transformations affecting modern America:

• population shifts

• urban-rural polarization

• demographic diversification

• economic inequality

• ideological conflict

• growing influence of national advocacy networks

The state’s expanding Muslim population, large immigrant communities, and active political environment make Illinois a major arena for debates over identity, religion, foreign policy, lobbying influence, and the future direction of American democracy.

Understanding Illinois today, therefore, requires attention not only to its demographic and economic realities but also to the larger political, cultural, and geopolitical forces reshaping American society in the twenty-first century.