Rock Island, IL Profile: Facts, Map & Data

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Rock Island, Illinois - Basic Facts

The City of Rock Island had a population of 38,764 as of July 1, 2017. 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 41.4702 and longitude -90.5831 in Rock Island County. The formal boundaries for the City of Rock Island (see map below) 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 South Rock Island, a minor civil division (MCD) of Rock Island County.

Beneath the boundary map are tables with Rock Island population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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


Neighborhood Data

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City of Rock Island, IL Boundary Map



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Boundary Maps: Township of South Rock Island | Rock Island County | Illinois Counties

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Rock Island, IL Data & Demographics (As of July 1, 2017)

POPULATION

Total Population 38,764
Daytime Population: Workers 21,255
Daytime Population: Residents 20,649
Total Daytime Population (TDP) 41,904
Ratio TDP/Total Population1 1.08
Population in Households 36,146
Population in Familes 26,767
Population in Group Qrtrs 2,618
Population Density2 2,303
Diversity Index3 58
 

INCOME

Median Household Income $41,078
Average Household Income $59,483
Per Capita Income $25,319

HOUSING

Total Housing Units 17,604 (100%)
Owner Occupied HU 9,767 (55.5%)
Renter Occupied HU 6,022 (34.2%)
Vacant Housing Units 1,815 (10.3%)
Median Home Value $95,435
Average Home Value $122,625
 

HOUSEHOLDS

Total Households 15,789
Average Household Size 2.29
Family Households 8,967
Average Family Size 3
NOTES
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. 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.

GROWTH RATE / YEAR

2010-2017 2017-2022
Population -0.09% -0.23%
Households -0.12% -0.21%
Families -0.37% -0.37%
Median Household Income   0.04%
Per Capita Income   1.97%

Rock Island, IL - Peer Comparisons by Rank and Percentile

The table below compares Rock Island to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2017 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 # 48 97th
Population Density # 209 85th
Diversity Index # 127 91st
Median Household Income # 1147 16th
Per Capita Income # 822 40th

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

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