Rock Island, IL Profile: Facts & Data

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Rock Island, Illinois - Basic Facts

The City of Rock Island had a population of 37,694 as of July 1, 2019. Rock Island ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Rock Island is located at latitude 41.5095 and longitude -90.5788 in Rock Island County. The formal boundaries for the City of Rock Island encompass a land area of 16.83 sq. miles and a water area of 0.2 sq. miles. Rock Island County is in the Central time zone (GMT -6). The elevation is 561 feet.

The City of Rock Island (GNIS ID: 2396400) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Rock Island is located within Township of Rock Island, a minor civil division (MCD) of Rock Island County.

Alternate Unofficial Names for Rock Island: Quad Cities, Stephenson.

Jump to... (On This Page!)
  1. Rock Island 2019 Demographic Data
  2. Growth Rates for Rock Island (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Illinois Research Tools (Easy Tools & Current Data)
  3. Illinois Data Comparison Tool - 2019 Demographics

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Rock Island, IL Data & Demographics (As of July 1, 2019)

HOUSING AFFORDABILITY INDEX

Rock Island, IL Housing Affordability Index is 175
State of Illinois Housing Affordability Index is 119
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.

WEALTH INDEX

Rock Island, IL Wealth Index is 67
State of Illinois Wealth Index is 105
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.

These new demographic attributes are availiable for cities, Counties, ZIP Codes and even neighborhoods (Census Blocks) when you search by a specific Illinois address.

See our:

  1. New 2-Minute Introduction and Concise Guide to Big Data which will help you make the most effective use of HomeTownLocator Tools.
  2. References & Data Sources page for more information about methodology and sources of data.

POPULATION

Total Population 37,694
Population in Households 35,068
Population in Familes 25,914
Population in Group Qrtrs 2,626
Population Density 2,236
Diversity Index1 60
 

INCOME

Median Household Income $46,631
Average Household Income $61,692
Per Capita Income $25,270
Wealth Index3 67

HOUSING

Total Housing Units 16,993 (100%)
Owner Occupied HU 9,232 (54.3%)
Renter Occupied HU 6,102 (35.9%)
Vacant Housing Units 1,659 ( 9.8%)
Median Home Value $110,453
Housing Affordability Index2 175
 

HOUSEHOLDS

Total Households 15,334
Average Household Size 2.29
Family Households 8,673
Average Family Size 3
NOTES
  1. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  2. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  3. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.

GROWTH RATE / YEAR

2010-2019 2019-2024
Population -0.37% -0.5%
Households -0.41% -0.51%
Families -0.65% -0.67%
Median Household Income   1.64%
Per Capita Income   2.01%

Rock Island, IL - Peer Comparisons by Rank and Percentile

The table below compares Rock Island to the other 1,369 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2019 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 49 96th
Population Density # 216 84th
Diversity Index # 121 91st
Median Household Income # 1090 20th
Per Capita Income # 1002 27th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.

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