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Crunching costs, sorting signals, rendering insights.
Crunching costs, sorting signals, rendering insights.
Nobody expects rock-bottom prices in Illinois — but that doesn't mean all cities are equally expensive. And on balance, rockford (index 86, rent $1,151/mo) carves out real savings within a high-cost market. We analyzed 5 cities to find where your money goes furthest in 2026.
Nobody expects rock-bottom prices in Illinois — but that doesn't mean all cities are equally expensive. And on balance, rockford (index 86, rent $1,151/mo) carves out real savings within a high-cost market. We analyzed 5 cities to find where your money goes furthest in 2026.
Rent data is sourced from Zillow's Observed Rent Index (ZORI), which tracks the median rent across all active listings — not just new leases. This gives a more representative and stable signal than asking prices alone. Rockford: $1,151/mo, Joliet: $1,559/mo, Elgin: $1,736/mo. The cheapest city here is $744 under the national median — that's $8,928/year in savings on rent alone.
Dive into Rockford's numbers: cost index 86 (26 points below national average), rent $1,151/month, income $53,328, and a home price of $172,610. The city's cost profile isn't flat — Housing is the cheapest category at 66, while Healthcare runs 89. With 146,120 residents, it balances mid-size city convenience with manageable costs.
If you've ever wondered why some 'cheap' cities don't feel cheap, this explains it: Rockford is a clear outlier at index 86. #1-ranked Rockford has a cost index 18 points lower than the top-5 average of 104. That's not a marginal lead — it's a category of its own.
What to do with this data: use the ranking as a shortlist, then dig into the city profiles for trend lines and category breakdowns. The difference between #1 and #5 is often smaller than the difference between "good on paper" and "actually fits my life." Compare your top picks with our calculator to see real take-home numbers.
#1 Ranked: Rockford — cost index 86, rent $1,151/mo, income $53,328
Rockford is a clear outlier at index 86
4 of 5 cities come in below the national cost-of-living average of 112
Data sourced from Census Bureau, Zillow, BLS, and Tax Foundation — current as of 2026
146,120 residents · Illinois
Rockford earns its position at #1 through a combination that's hard to replicate. The 86 cost index sits 26 points below the national baseline, and the $53,328 median income means purchasing power here is amplified by the low cost base. Homes list at $172,610 — $294,760 below the national median — a genuine ownership opportunity. On the cost side, Housing leads the way at 66, while Healthcare trails at 89.
150,489 residents · Illinois
What does daily life actually cost in Joliet? Start with the 21% rent-to-income ratio — that's the kind of margin that lets people build savings. On the category level, Utilities (index 89) is where the real savings show up, while Healthcare (index 100) is the line item most likely to surprise newcomers. Income at $88,026 and homes at $255,981 round out a profile that ranks #2 for clear reasons.
113,310 residents · Illinois
A closer look at Elgin: the cost index of 103 breaks down to a Utilities index of 94 (strongest category) and a Healthcare index of 106 (weakest). Median rent is $1,736/month — 8% below the national median — while household income sits at $88,316, meaning locals spend about 24% of income on rent. That's a healthy margin by any standard.
150,245 residents · Illinois
Naperville comes in at #4. Rent is $2,157 a month. Household income is $150,937. The cost of living index is 122. Take it or leave it — the data is what it is.
2,664,452 residents · Illinois
What does daily life actually cost in Chicago? Start with the 37% rent-to-income ratio — stretched, especially for single earners. On the category level, Utilities (index 102) is where the real savings show up, while Housing (index 127) is the line item most likely to surprise newcomers. Income at $75,134 and homes at $312,457 round out a profile that ranks #5 for clear reasons. Not flashy. Just effective.
#1-ranked Rockford has a cost index 18 points lower than the top-5 average of 104. That's not a marginal lead — it's a category of its own.
Rent ranges from $1,151/mo in Rockford to $2,292/mo in Chicago — a monthly difference of $1,141, or $13,692 per year.
Rent in #1-ranked Rockford has increased from $1,087 to $1,151/mo over the past 12 months — a 6% increase. Rising costs may erode its top ranking over time.
Cities are ranked by median 1-bedroom rent from Zillow's Observed Rent Index (ZORI). ZORI reflects the median rent across all listed units, not just new leases, providing a more stable and representative figure. All data is sourced from federal agencies and verified research institutions. Cost of living indices are normalized to 100 (national median) using Zillow rent as the primary signal, with sub-category adjustments derived from regional BLS price data. Rankings are updated monthly as new data is released.
Rockford ranks #1 in Illinois for this analysis with a cost index of 86 and median income of $53,328.
Our cost of living index uses real Zillow rent data as the foundation, indexed to 100 (national median). Sub-categories (housing, food, transport, utilities, healthcare) are derived from the overall index with regional adjustments. Data is updated monthly.
Rockford (ranked #1) has a cost index of 86 and rent of $1,151/mo, while Chicago (ranked #5) has a cost index of 111 and rent of $2,292/mo — a 25-point difference in cost of living.
City data is refreshed monthly from Census Bureau population estimates, Zillow rent and home price indices, BLS salary data, and Tax Foundation tax rates. Last updated: 2026.
The median 1-bedroom rent in Rockford is $1,151/month as of 2026, based on Zillow's Observed Rent Index. This is $744 below the national median of $1,895/month.
The median home price in Rockford is $172,610, which is 3.2× the local median income. That's within the standard 3.5× affordability rule for most local earners. The national median home price is $467,370.
Illinois has a 4.95% state income tax rate. Combined state and local sales tax averages 8.83%, and the effective property tax rate is 1.73%.
This ranking was generated using data current as of early 2026. Population and income data comes from the Census Bureau's American Community Survey (5-year estimates). Rent and home price data is from Zillow's monthly releases. Tax rates are from the Tax Foundation's 2025 edition. Rankings are refreshed monthly.