Rock Island County , Illinois

Rock Island County: County in Illinois, United States

Rock Island County locator map
Location of Rock Island County on Illinois map.

About

Rock Island County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 147,546 and a population density of 126 people per km². After 10 years in 2020 county had an estimated population of 140,907 inhabitants. Its county seat is Rock Island. The county was created 190 years ago in 1830.

Rock Island County Courthouse - Rock Island  Illinois image
Rock Island County Courthouse - Rock Island Illinois
Rock Island County Courthouse - Rock Island  Illinois image

Geography

Rock Island County is located at 41°28'2"N 90°34'3"W (41.4673300, -90.5674300). It has 4 neighbors: Clinton County, Muscatine County, Henry County and Mercer County.

Rock Island County map

The largest city of Rock Island County is Moline with a population of 41,065. Other cities include, Rock Island population 36,870, East Moline population 20,473, Silvis population 7,473 and Coal Valley population 3,719. See all Rock Island County cities & populated places.

Weather

Rock Island County forecast: Sunny, with a high near 65. more

Rock Island County Quick Facts

Population : 140,907 (2020)
Country : United States of America
State : Illinois (United States)
Different from : Rock County, Rock County, Rock County
Area : 1168 km2
Water as percent of area : 5.2%
Land as percent of area : 94.8%
Named for : Rock Island Arsenal
Altitude : 587 feet / 179 meters
Capital : Rock Island
Establishment : January 01, 1831
Time Zone : America/Chicago
Local time : 17:04:23 (17th October 2021)
Density : 121 Pop. per km² as of 2020
Population growth : -4.71% (2010-2020)
Weather : 65℉ Sunny 7-days weather

Rock Island County has 4 neighbours.

  • Rock Island

Demographics

According to census records, the population of Rock Island County decreased by 4.71% in 10 years.

Year Population % Change Method
2010 147,546 - census
2011 147,457 -0.06% estimation process
2012 147,672 0.15% estimation process
2013 147,650 -0.01% estimation process
2014 147,035 -0.42% estimation process
2015 146,094 -0.64% estimation process
2016 144,943 -0.79% estimation process
2017 143,828 -0.78% estimation process
2018 142,621 -0.85% estimation process
2019 141,879 -0.52% estimation process
2020 140,907 -0.69% estimation process

Comitatul Rock Island, Comte de Rock Island, Comté de Rock Island, Condado de Rock Island, Condado han Rock Island, Contea di Rock Island, Hrabstwo Rock Island, Okrug Rok Ajland, Quan Rock Island, Quận Rock Island, Rock Island, Rock Island Comitatus, Rock Island Kun, Rock Island Kūn, Rock Island konderria, Rock Island megye, Rok Ajlund, Rok-Ajlend, luo ke ai lan xian, mqatʿt rwk ayland, raka a'ilyanda ka'unti, rokkuairando jun, shhrstan rak ayslnd aylynwy, Округ Рок Ајланд, Рок Айлънд, Рок-Айленд, Ռոք Այլենդ շրջան, راک آئیلینڈ کاؤنٹی, راک جزیرہ کاؤنٹی، الینوائے, شهرستان راک ایسلند، ایلینوی, مقاطعة روك آيلاند, রক আইল্যান্ড কাউন্টি, ロックアイランド郡, 羅克艾蘭縣

Other places with the same name (1)

Rock Island County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Rock Island County.

City Name Population Title
Moline 41,065 City in Illinois
Rock Island 36,870 City in Illinois
East Moline 20,473 City in Rock Island County, Illinois, United States
Silvis 7,473 City in Rock Island County, Illinois, United States
Coal Valley 3,719 City in Illinois, United States of America
Carbon Cliff 1,932 City in Illinois, United States of America
Hampton 1,738 Human settlement in Rock Island County, Illinois, United States of America
Port Byron 1,597 City in Illinois, United States of America
Edgington 1,442 Township in Rock Island County, Illinois
Andalusia 1,088 Human settlement in Illinois, United States of America
Rapids City 962 Human settlement in Rock Island County, Illinois, United States of America
Buffalo Prairie 796 Township in Rock Island County, Illinois
Cordova 640 Village in the United States
Reynolds 508 Village in Illinois, USA
Hillsdale 502 Village in Illinois

Illinois Other Counties (more counties)

County Name Population Title
Cook County 5,108,284 County in Illinois, United States
Chicago 2,677,643 City and county seat of Cook County, Illinois, United States
DuPage County 917,481 County in Illinois, United States
Lake County 693,593 County in Oregon, United States
Will County 688,726 County in Illinois, United States
Kane County 531,010 County in southern Utah, United States
Markham 328,966 City in Cook County, Illinois, United States
McHenry County 305,888 County in Illinois, United States
Winnebago County 281,295 County in Illinois, United States
Madison County 262,635 County in Montana, United States
Saint Clair County 258,046 The County of St.
Champaign County 209,192 County in Illinois, United States
Aurora 196,383 City in Kane County, Illinois, United States
Sangamon County 193,882 County in Illinois, United States
Peoria County 177,652 County in Illinois, United States of America
McLean County 171,256 County in North Dakota, United States