Joliet Is Adding Rich People Faster Than Naperville. It Isn't Close.

Joliet's most famous resident is a fictional convict in a black suit and sunglasses.

That's the reputation. Jake Blues did his time there, the Speedway packed up its NASCAR weekend, the prison closed, and for about forty years Joliet has been the punchline whenever somebody in the collar counties wanted to feel superior about their ZIP code.

Somebody should tell the punchline it's now beating Naperville.

The number

SmartAsset ranked 357 U.S. cities by growth in high-income households — defined by the IRS as households earning $200,000 or more — using Census data from 2023 to 2024.

Joliet came in 27th in the country. First in Illinois.

The specifics:

• High-income households in 2023: 3,728

• High-income households in 2024: 5,367

• Growth: +53.5%

• Share of all households earning $200K+: 7.1% → 10.9%

In one year, Joliet added roughly 1,600 households pulling $200,000 or better. That's not a rounding error in a city of about 152,000. That's a mid-sized subdivision's worth of high earners showing up at once.

The scoreboard nobody in DuPage wants to look at

SmartAsset ranked eight Illinois cities. Here's the order:

City	National rank
Joliet	27
Elgin	64
Springfield	70
Chicago	141
Naperville	240
Aurora	314
Rockford	316
Peoria	331

Naperville — median household income $155,105, the suburb every relocation package treats as the default answer — finished 213 spots behind Joliet.

Before anyone in Naperville throws a chair: that ranking measures growth, not wealth. It is genuinely hard to grow your share of $200K households when you already have a mountain of them. More on that in the honest-counterpoint section, because I'd rather you hear the caveat from me than from your neighbor who read half the study.

But the direction is real. And the reason is sitting on 795 acres of former farmland.

What's actually happening out there

A $20 billion data center campus. In March, the Joliet City Council voted 8–1 to approve an annexation agreement for the Joliet Technology Center — a 795-acre, 24-building campus from Hillwood (the Ross Perot Jr. shop) and PowerHouse Data Centers, sited near the Speedway. The public hearing ran six and a half hours. Estimates attached to the project: 7,000 to 10,000 construction jobs over a five-to-seven-year build, about 700 permanent on-site positions, roughly $2.1 billion in tax revenue over 30 years, and up to $100 million from the developer toward streets, sidewalks and city services. Construction is targeted to start in early 2027.

Rock Run Collection. In May, the Council approved an updated development agreement for a 310-acre mixed-use retail, dining, residential and entertainment district at I-55 and I-80 — an interchange that moves about 228,000 vehicles a day. Anchor: Dick's House of Sport. Projected impact: about 8,000 construction jobs and 5,000 permanent jobs. The city structured a $37 million pay-for-performance GO bond, meaning public money is tied to the developer actually hitting benchmarks.

And the boring one that matters most. Joliet has been the freight capital of the Midwest for two decades. The intermodal yards and the warehouse belt built a logistics-management workforce — and logistics management pays. Those aren't $18/hour jobs; those are regional directors and operations executives who used to commute in from Naperville and Plainfield and eventually asked why.

The math a $200K household is doing

This is the whole story in two numbers.

Joliet's median list price in August 2026 sits around $331,000 (about $192/sq ft, 26 days on market). Naperville's median detached single-family sale price in July was $700,000 — flat year over year, and the second-highest in the western suburbs.

A household making $220,000 can buy in either place. In Naperville, they buy a house and a payment. In Joliet, they buy a house, a payment they don't think about, and the difference goes into a 529 and a boat.

That's not a knock on Naperville — its schools and downtown are worth the premium to plenty of buyers, and its inventory stayed tight all year. It's just that for the first time in a long time, the trade is a legitimate debate instead of an obvious answer.

Now the honest part

I'd be doing you a disservice if I let you take that 53.5% and run.

One year of Census data on a mid-sized city moves around. The same study had Waterbury, Connecticut jumping 271% in a single year. Numbers like that tell you the sample is thin, not that Waterbury became Greenwich. Treat Joliet's jump as a strong signal, not gospel.

Rich households arriving ≠ prices exploding. Zillow's home value index for Joliet was up only about 1.9% over the prior year as of its early-2026 read. High earners moved in; values did not go vertical. If you're pricing your Joliet house like it's Hinsdale because you read a headline, you'll sit.

The water bill is coming. Joliet's aquifer is projected to fall short by 2030, so the city and five neighbors formed the Grand Prairie Water Commission and are building a roughly $1.5 billion pipeline to bring Lake Michigan water down from Chicago. Construction started in 2025. The city's own projections have the average monthly water bill going from the mid-$30s to somewhere around $88–$93 by 2030, with increases continuing toward 2040. No Zestimate on earth captures that. Buyers should be running it into their carrying costs, and sellers should expect informed buyers to ask.

The data center isn't a signed deal for the neighborhood. At approval, developers had talked to Google, Amazon and Meta but had no customer agreements. Construction jobs are temporary by definition — 10,000 of them for five to seven years, then 700. Residents at the hearings raised real concerns about electricity and water demand. Anyone buying a house purely on the data-center narrative is buying a press release.

Joliet has water in the other direction too. Roughly 23% of Joliet properties carry a severe flood risk over the next 30 years — about 7,778 homes. Elevation and drainage vary enormously block to block down there. Pull the risk score before you write an offer, not after.

What to actually do with this

If you own in Joliet, Shorewood, Plainfield, Crest Hill or Channahon: your buyer pool changed and your comps haven't caught up. Homes in the $325K–$475K range with four bedrooms, two-plus baths and a garage that fits a full-size SUV are now competing for a household that was shopping DuPage two years ago. That is a pricing opportunity — but only if the house presents like a DuPage listing. Fresh paint, real photography, and a 3D walkthrough matter more when your buyer is comparison-shopping against Naperville on a laptop.

If you're buying: verify the school boundary before you fall in love. Joliet addresses split across District 86, District 202 and others, and the boundary lines do not follow the city limits. Then pull the flood score and the water rate schedule. Those two documents will tell you more about your ten-year cost than any listing remark.

If you're investing: the construction wave is a rental story before it's a resale story. Seven to ten thousand tradespeople starting in 2027 need somewhere to sleep, and they will not be buying. Small multifamily near the corridors is the play; just underwrite it as a five-to-seven-year window, not a permanent one.

Here's my part. When you sell with The Rosenberg Group, you pay a 1.25% listing commission — roughly half the standard rate. On a $400,000 Joliet sale, that's about $5,000 back in your pocket instead of the industry's $10,000. You also get the Zero Commission Clause (find your own buyer, pay me nothing) and a cancel-anytime policy, because I'd rather earn the listing every week than trap you in it.

Twenty-five years, over $100 million closed, city and suburbs both.

Want to know what your Will County home is actually worth in this market? Free, no-obligation valuation — with the comps, not just a number.

Jason Rosenberg | The Rosenberg Group at Infiniti Properties 312.882.9797 | www.jasonrosenbergrealestate.com

Sources

1. SmartAsset, "Cities Adding the Most High-Income Households – 2026 Study" — https://smartasset.com/data-studies/high-income-household-growth-2026

2. Belleville News-Democrat via AOL, "Which IL city is adding the most high-income households? It's 27th in the US" — https://www.aol.com/articles/il-city-adding-most-high-111500312.html

3. City of Joliet, "City of Joliet Approves Conditional Annexation for Proposed Joliet Technology Center Development" — https://www.joliet.gov/Home/Components/News/News/5666/41

4. Construction Owners, "Joliet Approves Illinois' Largest Data Center, 795-Acre Project Moves Forward" (reporting from Shaw Local and Bisnow) — https://www.constructionowners.com/news/joliet-approves-massive-795-acre-data-center-project

5. Construction Equipment Guide, "Joliet Approves Annexation for 795-Acre Data Center Project" — https://www.constructionequipmentguide.com/joliet-approves-annexation-for-795-acre-data-center-project/71012

6. FOX 32 Chicago, "Hundreds speak out as Joliet considers largest data center in state" — https://www.fox32chicago.com/news/hundreds-speak-out-joliet-considers-largest-data-center-state

7. City of Joliet, "City of Joliet Secures Agreement to Advance Rock Run Collection" — https://www.joliet.gov/Home/Components/News/News/5718/41

8. Movoto, Joliet, IL market data (August 2026) — https://www.movoto.com/joliet-il/

9. Option Premier, "Western Suburbs Average Sale Price Single Family Homes: July 2026" (InfoSparks data) — https://www.optionpremier.com/blogs/western-suburbs-average-sale-price-single-family

10. Zillow, Joliet, IL Home Values — https://www.zillow.com/home-values/32238/joliet-il/

11. World Population Review, Naperville and Joliet population and income data — https://worldpopulationreview.com/us-cities/illinois/naperville

12. FOX 32 Chicago, "Construction begins on Chicago project to send Lake Michigan water to southwest suburbs" — https://www.fox32chicago.com/news/chicago-joliet-water-construction

13. Shaw Local, "Joliet takes another look at water rate projections" — https://www.shawlocal.com/the-herald-news/news/2022/04/28/joliet-takes-another-look-at-water-rate-projections/

14. Wastewater Digest, "Rethink Water Joliet" — https://www.wwdmag.com/utility-management/article/10940142/rethink-water-joliet

15. Redfin, Joliet housing market and climate risk data (First Street) — https://www.redfin.com/city/29490/IL/Joliet/housing-market