The Most Similar States to Illinois

Illinois Similar states map

Have you ever wondered how similar or different two states are? The State Similarity Index attempts to quantify how similar states are to each other relative to other states. The index is a statistically-based way to measure this. The index weights equally five major aspects of states: their demographics, culture, politics, infrastructure, and geography. The research combines 1,000 different data points to arrive at the conclusions.

Top 5 States Most Similar to Illinois

Illinois is like other states that border the Great Lakes. It is located in the Rust Belt, an area of the United States that was once dominated by the manufacturing industry, before its recent decline due to outsourcing. The five most similar states all have temperate climates and tend to get a lot of snow in the winter. Illinois also has some similarity to states on the East Coast, since they also have large multicultural cities with many immigrants, like Chicago.

  1. Minnesota is another liberal Midwestern state that borders both the Mississippi River and Lake Michigan. Both states almost always vote for Democrats and have many laws to protect civil rights. Their average incomes are nearly the same. In addition, their geography is similar since Minnesota and Illinois are both quite flat and have much of their land includes tall grass prairies. Still, Minnesota is colder and its population is less diverse than Illinois.
  2. Wisconsin is just to the north of Illinois. In fact, all of Wisconsin was once part of Illinois Territory. Both states have many singles and few households with children. The states have similar percentages of Protestants and Catholics. The vast majority of the homes in these states are heated using natural gas. Although, both states often vote for the Democratic Party, Wisconsin requires a photo ID to vote and it has not legalized marijuana, unlike Illinois. Furthermore, it has more laws restricting abortion.
  3. Ohio is another Midwestern state with several large cities, including Columbus, Cincinnati, and Cleveland, although they are smaller than Chicago. Both states border the Ohio River and the Great Lakes. The states have a similar climate, so their agriculture is similar as well. They both grow a mix of corn and soybeans. However, Ohio is more conservative politically than Illinois, even though it has also had some Democratic senators and governors in its recent past.
  4. Michigan and Illinois both border Lake Michigan. People from Chicago and Detroit tend to have a similar accent. Their laws are similar too. Both states have legalized recreational marijuana and have banned the death penalty. They also do not allow first-cousin marriage. However, Michigan has a much higher percentage of forested land than Illinois. Still, these states both grow similar crops, mostly corn and soybean.
  5. Indiana located just to the east of Illinois and both states border Lake Michigan. There is little difference in their geography, except that Indiana has more forested land. These states also have a high density of railroads. The people in both states especially like basketball as well. However, these states are quite different politically. While Illinois heavily favors Democrats, Indiana favors Republicans.

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Top 5 States Least Similar to Illinois

The five least similar states to Illinois are all located in the Western portion of the United States. They all have more mountainous land and a lower percentage of cropland than Illinois. With the exception of Hawaii, these states tend to favor Republicans. The economy of these states also tends to depend far less on manufacturing than Illinois.

  1. Wyoming‘s infrastructure is quite different from Illinois. The state uses far more water and electricity per capita. It also has a much lower density of roads and railroads. Furthermore, few democrats are elected in Wyoming, although it did have a Democratic governor from 2003 to 2011. Wyoming also has no income tax, while Illinois generates a lot of money through it. In addition, Wyoming is more mountainous and has a drier climate.
  2. Alaska is colder, far more mountainous, and has much more coastline. Illinois is also far more densely populated and developed. In addition, Alaska favors the Republican Party, unlike Illinois, although it is not the most conservative state. Alaska also has a high percentage of people in the military in contrast to Illinois. While Illinois has a lot of farming, Alaska is too cold to be farmed commercially.
  3. Utah‘s culture and geography are extremely different from Illinois. Utah’s population has a majority of Mormons. In addition, it is the youngest state on average. Furthermore, it has a high percentage of married people and few singles. In addition, much of Utah is a desert. It is also far more mountainous than Illinois. Like the other states on this list, it nearly always votes for Republicans in state-wide elections.
  4. Idaho‘s government is much more conservative than Illinois’. It has less protections for civil rights.  It has not yet legalized marijuana. In addition, Idaho still has the death penalty. The state is also more mountainous. It also has a colder and drier climate. Furthermore, the state is not nearly as densely populated as Illinois. It has a predominately White population, so its demographics are not as diverse either.
  5. Hawaii‘s population has a much higher percentage of Asians than Illinois, but a much lower percentage of Blacks. Its geography is also far different. It has a tropical climate. It is also more mountainous and has more coastline as well.  While Illinois has a dense train network, Hawaii has no operating passenger or freight railroads. Still, both states do favor Democrats and have liberal laws.

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Illinois is like if Minnesota was more like New Jersey

According to the Index, Minnesota is the most similar state to Illinois. However, these states also have some big differences. One state that has aspects of Illinois that Minnesota lacks is New Jersey. The demographics of Illinois and New Jersey are much more diverse than Minnesota. They have a higher percentage of Blacks and Latinos. These states also have more restrictions on guns and less restrictions on abortions than Minnesota. In addition, they are more densely populated and have skyscrapers. Furthermore, more people use mass transit in these states than in Minnesota.

Full Ranking of States Most Similar to Illinois

All data accurate as of 2020.

State Superlatives

Most Similar Demographics: Delaware
Most Similar Culture: Michigan
Most Similar Government: Oregon
Most Similar Infrastructure: Ohio
Most Similar Geography: Indiana

Least Similar Demographics: West Virginia
Least Similar Culture: Louisiana
Least Similar Government: South Carolina
Least Similar Infrastructure: Alaska
Least Similar Geography: Hawaii

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    1. 6.) PENNSYLVANIA and Illinois are both U.S. states with diverse economies and rich histories. Both have major cities—Chicago in Illinois and Philadelphia in Pennsylvania—that contribute significantly to their respective states’ cultural and economic landscapes. Additionally, they are known for their agricultural sectors and played crucial roles in American industrial development. Furthermore, both states also have similar demographics, since there are many people with Italian or Irish ancestry. Residents of both states experience four distinct seasons, and recreational opportunities like sports, cultural events, and outdoor activities are prevalent in both Illinois and Pennsylvania. Additionally, residents in both states have access to diverse educational and healthcare facilities. However, one big difference is their geography, since Pennsylvania is more mountainous, in contrast to Illinois.

      7.) NEW YORK and Illinois share urban vibrancy and cultural diversity, with iconic cities like Chicago and New York City. Both states boast thriving economies, diverse job markets, and a range of cultural and entertainment options. Additionally, they have extensive transportation networks, providing residents with various commuting options. Both Illinois and New York have significant minority populations. Chicago, in Illinois, and New York City are known for their diverse communities, including sizable African American, Hispanic, Asian, and other minority populations. These cities serve as cultural melting pots, reflecting the rich tapestry of ethnicities and backgrounds. Both states embrace and celebrate their diverse communities, contributing to a multicultural atmosphere in everyday life. However, New York is more mountainous than Illinois.

      8.) NEW JERSEY borders the Atlantic Ocean, not the Great Lakes, but still has many in common with Illinois. The racial demographics of New Jersey and Illinois are especially similar. They have about the same percentage of Whites, Blacks, and Latinos. These states also have a higher than average portion of Catholics. However, neither state is particularly religious. Furthermore, their median age and percentage of married people are also about the same. A relatively high percentage of their people are union members too. They are also similar politically. Both Illinois and New Jersey are generally considered to be Democratic-leaning states. In presidential elections, they tend to vote for Democratic candidates more often than Republican candidates. In addition, in the past few decades, they nearly always vote for the same presidential candidates in primaries. Their laws are similar as well. Both states have many laws that protect the discrimination of minorities and the LGBTQ community. They also have few restrictions on abortion. Both states have legalized the recreational use of marijuana as well.

      9.) CONNECTICUT is located across the Westchester County of the New York State from New Jersey. There are many Protestants and less Catholics in Connecticut and Illinois. Furthermore, the people in Connecticut and Illinois are among the most religious in the USA. These states also allow undocumented immigrants to get driver’s licenses and in-state college tuition. They also have lower income taxes. In addition, both states are less Democratic than most other states. Moreover, both states also have extremely similar demographics, since many of their inhabitants have either Italian, Irish, Polish, French, German, or Scottish ancestry.

      10.) MARYLAND and Illinois, despite their geographical separation, share similarities in certain aspects. Both states have a mix of urban and suburban areas, providing residents with diverse living environments. Additionally, they boast strong educational systems, with reputable universities and research institutions. Residents in both states experience a range of seasons, offering outdoor activities and cultural events. Access to quality education, healthcare, and recreational facilities is common in both Illinois and Maryland. Everyday life is shaped by the blend of suburban and urban settings, contributing to a dynamic lifestyle for residents in both states.

      11.) IOWA borders Illinois to its southeast. Both states have a strong agricultural presence, with extensive farmland and a focus on corn and soybean production. Residents in both Illinois and Iowa often experience a typical Midwestern lifestyle characterized by friendly communities and a slower pace of life compared to more urbanized areas. Additionally, they share similarities in weather patterns, with four distinct seasons influencing daily life. However, Illinois’ demographics are more diverse than Iowa’s.

  1. Illinois is like if Michigan was more like Nevada

    According to ChatGPT, Michigan is the most similar state to Illinois. However, there are many differences. Because of this, one state that has many traits of Illinois that Michigan lacks is Nevada. Both states are much wealthier than Michigan, as well as more conservative. Furthermore, both states also have more immigrants from Mexico and less Middle Easterners than Michigan.

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