Population
Decatur
70,368
Rock Island
36,758
Median Income
Decatur
$50,809
Rock Island
$57,292
Home Value
Decatur
$97,300
Rock Island
$118,400
Rent
Decatur
$796
Rock Island
$819
Crime Rate
Decatur
6.04
Rock Island
5.44
Cost of Living
Decatur
81.3
Rock Island
88.8
Avg Temp
Decatur
N/A
Rock Island
N/A
Unemployment
Decatur
8.9%
Rock Island
6.5%
How Similar Are Decatur & Rock Island?
Rock Island is Decatur's #15 most similar city
5 of 10 key metrics match within 10%
Population
Decatur
70,368
Rock Island
36,758
Decatur has a 48% larger population than Rock Island.
Violent Crime
Decatur
6.04
Rock Island
5.44
Both cities have similar violent crime — just a 10% difference.
Property Crime
Decatur
28.67
Rock Island
27.15
Both cities have similar property crime — just a 5% difference.
Political Leaning
Decatur
58.7%
Rock Island
44.4%
Decatur leans Republican while Rock Island leans Democratic.
Unemployment
Decatur
8.9%
Rock Island
6.5%
Decatur has a 27% higher unemployment than Rock Island.
Median Income
Decatur
$50,809
Rock Island
$57,292
Rock Island has a 11% higher median income than Decatur.
Home Values
Decatur
$97,300
Rock Island
$118,400
Rock Island has a 18% higher home values than Decatur.
Education
Decatur
14.7%
Rock Island
14.4%
Both cities have similar education — just a 2% difference.
Demographics
Decatur
67.2%
Rock Island
68.0%
Both cities have similar demographics — just a 1% difference.
Cost of Living
Decatur
81.3
Rock Island
88.8
Both cities have similar cost of living — just a 8% difference.
5 out of 10 key metrics match within 10%. Decatur and Rock Island share several key characteristics.
At a Glance
0
Decatur
0
Rock Island
Decatur leads in 4 of 8 categories
Cost of Living & Affordability — Decatur leads
Source: City Stats Index / HUDDecatur scores 74.6 on the transportation index (100 = national avg) vs 83.1 in Rock Island. Decatur scores 77.7 on the housing index (100 = national avg) vs 86.4 in Rock Island. Decatur has a fair market rent (1br) of $845 vs $928 in Rock Island (9% lower).
Overall Cost Index
Housing Index
Food Index
Transportation Index
Healthcare Index
Utilities Index
Living Wage (1 Adult)
Living Wage (Family of 4)
Fair Market Rent (1BR)
Fair Market Rent (2BR)
Housing Market
Source: U.S. Census Bureau ACSRock Island has a vacancy rate of 9.2% compared to 14.4% in Decatur. Decatur has a median property tax of $2,153 vs $2,861 in Rock Island (25% lower). Rock Island has a median home value of $118,400 vs $97,300 in Decatur (18% higher).
Median Home Value
Median Rent
Median Property Tax
Owner-Occupied
Vacancy Rate
Single-Family Homes
Jobs & Economy — Rock Island leads
Source: U.S. Census Bureau ACSDecatur: 31,832 vs Rock Island: 18,035 for labor force. Rock Island has a unemployment rate of 6.5% compared to 8.9% in Decatur. Rock Island has a work from home of 8.8% compared to 7.5% in Decatur.
Median Household Income
Per Capita Income
Poverty Rate
Unemployment Rate
Labor Force
Mean Commute
Work from Home
Private Sector
Government Sector
Crime & Safety — Rock Island leads
Source: FBI UCRRock Island has a robbery rate (per 1k) of 0.14 compared to 0.94 in Decatur. Decatur has a property crime clearance of 24.3% compared to 8.9% in Rock Island. Rock Island has a larceny rate (per 1k) of 11.55 compared to 15.32 in Decatur.
Violent Crime Rate (per 1K)
Property Crime Rate (per 1K)
Murder Rate (per 1K)
Robbery Rate (per 1K)
Assault Rate (per 1K)
Burglary Rate (per 1K)
Larceny Rate (per 1K)
Violent Crime Clearance
Property Crime Clearance
Weather & Climate
Source: NOAA / Open-MeteoAvg Annual Temperature
Avg Annual High
Avg Annual Low
Sunny Days per Year
Annual Rainfall
Annual Snowfall
Avg Humidity
Schools & Education — Decatur leads
Source: NCES / U.S. Census BureauDecatur has a high school diploma or higher of 42.5% compared to 34.2% in Rock Island. Decatur has a bachelor's degree or higher of 14.7% compared to 14.4% in Rock Island.
Public Schools
Avg Student-Teacher Ratio
Colleges & Universities
Bachelor's Degree or Higher
High School Diploma or Higher
Demographics & Community
Source: U.S. Census Bureau ACSDecatur has a population of 70,368, about 1.9x the size of Rock Island (36,758). Rock Island skews younger with a median age of 37.1 vs 39.9.
Population
Median Age
Avg Household Size
Married Population
Foreign Born
White
Black
Hispanic
Asian
Decatur
Rock Island
Healthcare — Decatur leads
Source: CMS Hospital CompareDecatur: 2.7 vs Rock Island: 2.0 for avg cms rating (out of 5). Decatur: 5 vs Rock Island: 4 for with emergency services.
Nearby Hospitals
Avg CMS Rating (out of 5)
With Emergency Services
Transportation & Commute — Decatur leads
Source: U.S. Census Bureau ACSDecatur has a bicycle of 0.1% compared to 0.1% in Rock Island. Rock Island has a public transit of 2.4% compared to 1.3% in Decatur. Rock Island has a work from home of 8.8% compared to 7.5% in Decatur.
Mean Commute Time
Drive Alone
Public Transit
Bicycle
Work from Home
Airports
Cities Similar to Decatur, IL
Compare Decatur against its closest statistical matches across demographics, income, crime, health, and more.
City Comparison
8-axis fingerprint: population, income, housing, crime, education, age, climate, and cost of living. Click legend items to toggle.