Rock Island, IL Population

Overview

37,519

Total Population

35.4

Median age

50.01%

Female population %

1:100

Gender ratio (M:F)

15-19 years

Largest age group

54.9

Total dependency ratio

White

Largest racial group

5,136

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Rock Island's population is young compared to the rest of the country:

The median age in Rock Island is 35.4, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Rock Island's population under 18 was 22.30%, compared to the 22.51% nationwide.
Rock Island's elderly or the senior population (over 65 age) was 17.00% as compared to 16.04% nationwide.
Of the total population in Rock Island, 18.43% were under the age of 15, 24.15% aged 15 to 29, 40.42% aged 30 to 64, 14.48% aged 65 to 84, and 2.52% were 85 years of age and older.

There are 5 more females than males in Rock Island:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.01% females and 49.99% males in Rock Island, IL.
The Rock Island, IL gender ratio is 1:100 i.e. 1 men to 100 women (1.000).
For male population, the largest age group is 20-24 years with a population of 1,738.
For the female population, the largest age group is 15-19 years with a population of 1,958.

Rock Island's population has become increasingly diverse:

Racial distribution of Rock Island population: 67.83% are White, 18.94% are Black or African American, 0.38% are American Indian and Alaska Native, 4.58% are Asian, 0.49% are Native Hawaiian and other Pacific Islander, 2.26% are some other race and 5.51% are multiracial.
Rock Island's racial breakdown clearly shows that there is an absolute majority of White population in the city.
By ethnicity, 5,136 is Hispanic or Latino (of any race), and 32,383 (86.31% of the total population) is Non-Hispanic.
The largest racial group in Rock Island is White with a population of 25,451 (67.83% of the total population).

Rock Island's population has already reached its peak and is showing a trend of decline:

The peak population was 39,523 in the year 2000
From 2000 to 2010, Rock Island's population decreased by 550 (1.39%), as compared to the national growth of 9.63%.
From 2010 to 2020, Rock Island's population decreased by 1,960 (5.03%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Rock Island's population was lowest in year 2022 at 36,256.