Joliet is a city located in Kendall County and Will County Illinois. Joliet has a 2023 population of 150,718. It is also the county seat of Will County.Joliet is currently growing at a rate of 0.11% annually and its population has increased by 0.35% since the most recent census, which recorded a population of 150,199 in 2020.
The average household income in Joliet is $92,440 with a poverty rate of 10.75%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Joliet is 33.6 years, 32.9 years for males, and 34.6 years for females.
Located some 30 miles southwest of Chicago in the Kendall and Will counties, Joliet is the third largest city in the state of Illinois, recently overtaking Naperville, and is the county seat of Will County. Joliet is part of the Chicago metro area, known as Chicagoland, which as an estimated population of more than 9.5 million as the country's third-largest metro area.
At the time of Joliet’s incorporation in the 1850s, the population stood at around 2,700. This had exploded by 1860 to over 7,000. The 1890s saw the next largest percentage of growth, with a 7.15% annual growth rate, growing from 11,685 in 1880 to 23,264.
A relatively steady rise continued in the decades to come, until the years between 1970 and 1990 saw a growth rate of -25%. This turned around through the decade up to the year 2000, however, due in no small part to millions of dollars of government spending to revitalize the city. This brought a rise from 76,836 in 1990 to over 106,000 in 2000. Between 2010 and 2011, Joliet was the fastest growing city in the Midwestern United States, and the 18th fastest growing city in the country as a whole. Joliet is expected to continue its modest growth.
Louis Joillet, namesake of the city, and Father Jacques Marquette set up camp along the Des Plaines River on a large mound just outside present day Joliet in 1673. The hill would go on to be called Mound Jolliet, and become a popular site for mining by early settlers.
In the aftermath of the Black Hawk war in 1833, a cabin was built along the Des Plaines River. Over the river from this, the village called “Juliet” was built. The name was changed in 1845 to “Joliet” and was incorporated a second time (after a first attempt was rescinded almost 10 years prior due to residents’ desire to tax expenses) in 1852.
The 1870s saw some of the first steel mills in the entire country being built in Joliet, seeing its previous main commodity stone replaced with steel, earning it the nickname “The City of Steel.” This attracted thousands of southeastern Europeans to Joliet, who also found work on the railway that serviced the mill.
The large labor force allowed the city to attract other industries. Brick companies, horseshoe factories, machine manufacturers, bridge builders, and many more established their businesses in the area, and continued to do so well toward the end of the 20th century.
Today, millions of people visit Joliet for its riverboat casinos and NASCAR racetracks.
According to the most recent ACS, the racial composition of Joliet was:
Black or African American
Two or more races
Native Hawaiian or Pacific Islander
Average Family Size
Average Household Size
Rate of Home Ownership
Less Than 9th Grade
9th to 12th Grade
High School Graduate
High School Graduation Rate
The highest rate of high school graduation is among white people with a rate of 80.45%.
The highest rate of bachelors degrees is among asian people with a rate of 46.15%.
Other Indo-European Languages
Asian and Pacific Island Languages
71.19% of Joliet residents speak only English, while 28.81% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 25.56% of the population.
Overall Poverty Rate
Male Poverty Rate
Female Poverty Rate
The race most likely to be in poverty in Joliet is Native, with 35.95% below the poverty level.
The race least likely to be in poverty in Joliet is White, with 5.79% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 2.49%. Among those working part-time, it was 11.02%, and for those that did not work, the poverty rate was 18.85%.
Overall Marriage Rate
Male Marriage Rate
Female Marriage Rate
The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.
Second Gulf War
First Gulf War
World War II
Less Than 9th Grade
High School Graduate
Bachelors or Greater
Veteran Poverty Rate
Veteran Disability Rate
Labor Force Participation
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Born in Joliet
87.43% of Joliet residents were born in the United States, with 73.88% having been born in Illinois. 7.66% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.