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Iowa Population News Articles

Population Density

Historic & Projected Growth

Population by County


POPULATION DENSITY

People per square mile, 2010:   54.5

People per square mile, 2020:  57.1


HISTORIC & PROJECTED GROWTH 1790 TO 2040

Year
Population
1790
0
1800
0
1810
0
1820
0
1830
0
1840
43,112
1850
192,914
1860
674,913
1870
1,194,020
1880
1,624,615
1890
1,912,297
1900
2,231,853
1910
2,224,771
1920
2,404,021
1930
2,470,939
1940
2,538,268
1950
2,621,073
1960
2,757,537
1970
2,825,368
1980
2,913,808
1990
2,776,755
2000
2,926,324
2010
3,046,355
2020
3,190,369
2030
3,317,412
2040
3,392,783

SOURCE: U.S. Bureau of the Census & Weldon Cooper Center, Demographics Research Group
(The Census Bureau and Weldon Cooper Center have not yet provided updated State projections to reflect 2020 census numbers.)


Population by County

Population By County
Census 2020 Population
Census 2010 Population
Change from 2010
Percent Change
IOWA
3,190,369
3,046,355
-144,014
-4.51%
Adair County
7,496
7,682
-186
-2.42%
Adams County
3,704
4,029
-325
-8.07%
Allamakee County
14,061
14,330
-269
-1.88%
Appanoose County
12,317
12,887
-570
-4.42%
Audubon County
5,674
6,119
-445
-7.27%
Benton County
25,575
26,076
-501
-1.92%
Black Hawk County
131,144
131,090
54
0.04%
Boone County
26,715
26,306
409
1.55%
Bremer County
24,988
24,276
712
2.93%
Buchanan County
20,565
20,958
-393
-1.88%
Buena Vista County
20,823
20,260
563
2.78%
Butler County
14,334
14,867
-533
-3.59%
Calhoun County
9,927
9,670
257
2.66%
Carroll County
20,760
20,816
-56
-0.27%
Cass County
13,127
13,956
-829
-5.94%
Cedar County
18,505
18,499
6
0.03%
Cerro Gordo County
43,127
44,151
-1,024
-2.32%
Cherokee County
11,658
12,072
-414
-3.43%
Chickasaw County
12,012
12,439
-427
-3.43%
Clarke County
9,748
9,286
462
4.98%
Clay County
16,384
16,667
-283
-1.70%
Clayton County
17,043
18,129
-1,086
-5.99%
Clinton County
46,460
49,116
-2,656
-5.41%
Crawford County
16,525
17,096
-571
-3.34%
Dallas County
99,678
66,135
33,543
50.72%
Davis County
9,110
8,753
357
4.08%
Decatur County
7,645
8,457
-812
-9.60%
Delaware County
17,488
17,764
-276
-1.55%
Des Moines County
38,910
40,325
-1,415
-3.51%
Dickinson County
17,703
16,667
1,036
6.22%
Dubuque County
99,266
93,653
5,613
5.99%
Emmet County
9,388
10,302
-914
-8.87%
Fayette County
19,509
20,880
-1,371
-6.57%
Floyd County
15,627
16,303
-676
-4.15%
Franklin County
10,019
10,680
-661
-6.19%
Fremont County
6,605
7,441
-836
-11.24%
Greene County
8,771
9,336
-565
-6.05%
Grundy County
12,329
12,453
-124
-1.00%
Guthrie County
10,623
10,954
-331
-3.02%
Hamilton County
15,039
15,673
-634
-4.05%
Hancock County
10,795
11,341
-546
-4.81%
Hardin County
16,878
17,534
-656
-3.74%
Harrison County
14,582
14,928
-346
-2.32%
Henry County
20,482
20,145
337
1.67%
Howard County
9,469
9,566
-97
-1.01%
Humboldt County
9,597
9,815
-218
-2.22%
Ida County
7,005
7,089
-84
-1.18%
Iowa County
16,662
16,355
307
1.88%
Jackson County
19,485
19,848
-363
-1.83%
Jasper County
37,813
36,842
971
2.64%
Jefferson County
15,663
16,843
-1,180
-7.01%
Johnson County
152,854
130,882
21,972
16.79%
Jones County
20,646
20,638
8
0.04%
Keokuk County
10,033
10,511
-478
-4.55%
Kossuth County
14,828
15,543
-715
-4.60%
Lee County
33,555
35,862
-2,307
-6.43%
Linn County
230,299
211,226
19,073
9.03%
Louisa County
10,837
11,387
-550
-4.83%
Lucas County
8,634
8,898
-264
-2.97%
Lyon County
11,934
11,581
353
3.05%
Madison County
16,548
15,679
869
5.54%
Mahaska County
22,190
22,381
-191
-0.85%
Marion County
33,414
33,309
105
0.32%
Marshall County
40,105
40,648
-543
-1.34%
Mills County
14,484
15,059
-575
-3.82%
Mitchell County
10,565
10,776
-211
-1.96%
Monona County
8,751
9,243
-492
-5.32%
Monroe County
7,577
7,970
-393
-4.93%
Montgomery County
10,330
10,740
-410
-3.82%
Muscatine County
43,235
42,745
490
1.15%
O’Brien County
14,182
14,398
-216
-1.50%
Osceola County
6,192
6,462
-270
-4.18%
Page County
15,211
15,932
-721
-4.53%
Palo Alto County
8,996
9,421
-425
-4.51%
Plymouth County
25,698
24,986
712
2.85%
Pocahontas County
7,078
7,310
-232
-3.17%
Polk County
492,401
430,640
61,761
14.34%
Pottawattamie County
93,667
93,158
509
0.55%
Poweshiek County
18,662
18,914
-252
-1.33%
Ringgold County
4,663
5,131
-468
-9.12%
Sac County
9,814
10,350
-536
-5.18%
Scott County
174,669
165,224
9,445
5.72%
Shelby County
11,746
12,167
-421
-3.46%
Sioux County
35,872
33,704
2,168
6.43%
Story County
98,537
89,542
8,995
10.05%
Tama County
17,135
17,767
-632
-3.56%
Taylor County
5,896
6,317
-421
-6.66%
Union County
12,138
12,534
-396
-3.16%
Van Buren County
7,203
7,570
-367
-4.85%
Wapello County
35,437
35,625
-188
-0.53%
Warren County
52,403
46,225
6,178
13.37%
Washington County
22,565
21,704
861
3.97%
Wayne County
6,497
6,403
94
1.47%
Webster County
36,999
38,013
-1,014
-2.67%
Winnebago County
10,679
10,866
-187
-1.72%
Winneshiek County
20,070
21,056
-986
-4.68%
Woodbury County
105,941
102,172
3,769
3.69%
Worth County
7,443
7,598
-155
-2.04%
Wright County
12,943
13,229
-286
-2.16%

SOURCE: U.S. Bureau of the Census


Iowa Population News Articles

Tiffin plans major expansion with $10 million rec center amid population boom – Sept 18, 2024

Iowa releases ‘Condition of the State’ report on clean energy goals – Sept 12, 2024

Iowa has second-in-the-nation cancer rate; Residents doubt cause – Sept 4, 2024

Iowa joins 15 other GOP-led states in new immigration lawsuit – Aug 23, 2024

Changing climate contributes to record Iowa tornado season – July 1, 2024

Factory Farm Waste Intensifies Health Risks In NW Iowa Flooding – June 25, 2024

Data Shows Iowa Air Quality Monitoring is Insufficient to Protect Public Health – June 18, 2024

Advocates, law enforcement react to temporary injunction on Iowa migrant reentry law – June 18, 2024

Iowa readies a $200 million bond to control agricultural runoff and improve water quality – June 3, 2024

An Iowa farm county seeks answers amid cancer rates 50% higher than national average – May 7, 2024

Iowa officials describe border security efforts during recent $2 million deployment – October 25, 2023

The 5 Fastest Growing Towns in Iowa Everyone Is Talking About – October 23, 2023

What does Iowa water quality look like after 10 years with the Nutrient Reduction Strategy? – October 18, 2023

Discover the Largest Cities in Iowa (By Population, Total Area, and Economic Impact) – October 14, 2023

Iowa’s Latino youth will help shape the future of an aging state – October 3, 2023

Iowa Has A Jaw Dropping Number Of Registered Cars On The Road – July 12, 2023

DROUGHT CONDITIONS CONTINUE TO LINGER IN SOUTHEAST IOWA – July 7, 2023

Iowa electric vehicle registrations up nearly 30%, but charging stations lag – July 7, 2023

Iowa climate action leaders optimistic in face of new records – July 5, 2023

Iowa expert shares lessons about hog production and water pollution – June 30, 2023

Iowa Factory Farms Are Supercharging the Climate Crisis – December 13, 2022

Iowa Watershed Watchers Want Action on Climate Change – December 11, 2022

Is Cedar River segment impaired for nitrate? Experts disagree – December 7, 2022

Rapid growth in Tiffin spurs exciting new projects in the corridor – December 2, 2022

‘Major source’ of air pollution operated without permits for decades, DNR says – November 22, 2022

Swimming not recommended at these 11 Iowa beaches due to high bacteria levels, DNR says – July 17, 2022

Homelessness Symposium aims to end homeless crisis in Iowa – July 13, 2022

Scientists say Iowa’s future climate could lead to more amoeba cases – July 12, 2022

Detailed Dive Into Iowa Drought and Crop Conditions – July 8, 2022

Iowa court reverses precedent on Iowa pig farm lawsuits – June 30, 2022

The Trickle-Down Effect of Agriculture in Iowa – March 16, 2022

One rural Iowa town wants to grow. So, it’s building its first child care center. – March 15, 2022

Another push to update Iowa’s 44-year-old ‘Bottle Bill’ – March 14, 2022

Concern on the rise over carbon capture pipelines in North Iowa – March 10, 2022

Iowa impaired waters list grows in 2022 – February 21, 2022

Company Plans To Grind Wind Turbine Blades Near Earlham, Iowa – November 23, 2021

Climate change is making it harder to provide clean drinking water in farm country – November 23, 2021

‘We don’t have much time’: University of Iowa adds another sustainability-focused program – November 14, 2021

This Is the Fastest Growing City in Iowa – November 12, 2021

Pollution around some eastern Iowa factories is higher than federal goal – November 11, 2021

The Elbert Files: Iowa’s bad water – September 17, 2021

4.5 million Iowa trees damaged by 2020 derecho – September 16, 2021

September is the second-fastest warming month in Des Moines, data shows – September 14, 2021

EPA fines Iowa diesel repair company $75,000 for disabling equipment to reduce air pollution – Aug 31, 2021

North Liberty has fastest growing population above 5,000 in Iowa – Aug 29, 2021

DeLong to lead ISU Extension Water Quality Program – June 27, 2021

Iowa Supreme Court halts lawsuit over farm runoff pollution – June 18, 2021

Experts say climate change is not driving state-wide drought – June 18, 2021

Double whammy: Heat, toxic algae bedevil water sector – June 16, 2021

Four Iowa Beaches Already Under Water Quality Advisories – June 14, 2021

Burras: Pesticides, forest degradation, extreme weather leading to monarch butterfly decline – March 4, 2021

Migrating swans move through Iowa – March 10, 2021

Environmentalists make long-shot attempt to ban new factory farms – February 23, 2021

New research reaffirms the local impact of climate change in Iowa – March 15, 2021

Des Moines considers clean energy resolution – December 9, 2020

Citing concerns over city resources, Iowa City Council tables discussion on 196-acre annexation – December 2, 2020

750 Iowa water bodies considered impaired, but number declines for first time in two decades – December 1, 2020

IOWA CONSIDERS PURCHASING MORE LAND FOR PARK FOR WATER QUALITY PROTECTIONS – November 26, 2020

Saturated buffer slated to improve water quality near Indian Creek – November 18, 2020

Federal funding coming for repairs to flood-damaged western Iowa roads – September 29, 2020

Loss of milkweeds linked to drop in monarch butterfly population – September 9, 2020

Iowa Farmers Face Climate-Fueled Destruction, While the Industry Says it’s ‘Just Weather’ – September 9, 2020

DNR issues 10 E. coli beach warnings for August 7-13 – August 7, 2020

Iowa sees hotter-than-normal year so far – August 7, 2020

Rural watershed residents trying to kick urban counties out of watershed council – July 31, 2020

Iowa DNR: Fireworks triggered fine particle pollution at some sites – July 17, 2020

Farmers join programs that pay them to combat climate change in Iowa – July 16, 2020

DNR issues 10 E. coli beach warnings for August 7-13 – August 7, 2020

Iowa sees hotter-than-normal year so far – August 7, 2020

Rural watershed residents trying to kick urban counties out of watershed council – July 31, 2020

Iowa DNR: Fireworks triggered fine particle pollution at some sites – July 17, 2020

Farmers join programs that pay them to combat climate change in Iowa – July 16, 2020

Iowa farm group restoring habitat for bees, fish – May 18, 2020

Panorama Park in Scott County estimated to be fastest growing city in the state – May 22, 2020

Farmers Must Adapt as U.S. Corn Belt Shifts Northward – May 26, 2020

Study shows how development threatens farmland – June 3, 2020

Adding Job Creation to List of Benefits From Ag Conservation – June 9, 2020

Iowa’s Population Trends Similar to Neighboring States – Feb 1, 2020

Iowa Farmers Union takes aim at climate change – January 25, 2020

Riverdale housing plat receives OK, could double city’s population – January 8, 2020

Ames Prepares for Major Population Growth by 2040 – January 7, 2020

Iowa City firefighters see increased service calls for 2019 – January 5, 2020

As Des Moines grows, so does the city’s air pollution – October 24, 2019

Will Rollback of Pollution Regulations Accelerate Iowa Climate Change? – October 21, 2019

Climate change is shaping Iowa’s physical and political landscape – October 13, 2019

Report: Climate Change Impacts Clearer In Iowa Than Much Of US – September 5, 2019

90 minutes or more to get to work? It’s becoming more common, even in Iowa – September 3, 2019

Is county sitting on trillion dollar fortune? Supervisors contract Iowa law students to study implications – August 31, 2019

Iowans Creating Habitats to Reverse the Decline of Monarch Butterflies – August 26, 2019

Iowa’s Future Caucus investigates how to grow renewable energy industry – August 16, 2019

Bigger trucks will cause bigger problem for Iowa’s ailing bridges, state and local officials tell Congress – July 8, 2019

Nitrates in Iowa drinking water: What does it mean for you? – June 28, 2019

Iowa Water Festival connects community to water quality issues – June 23, 2019

It’s a record: Iowa has wettest 12-month period since official records began in 1895 – June 15, 2019

Iowans use a lot of energy. Here’s how much. – May 3, 2019

Iowa water quality getting worse, underfunded – May 3, 2019

Iowa’s dams, bridges and levees earn poor marks on report card – May 2, 2019

Iowa State Study Highlights Continuing Rural to Metro Population Change – April 26, 2019

UI students make campus green space more habitable for bees with a new garden – April 25, 2019

Conservation efforts in Iowa contribute to long-term monarch recovery – February 7, 2019

Onawa water starting to clear up with treatment – February 7, 2019

Factory Farms Pollute the Environment and Poison Drinking Water – January 29. 2019

Interstate projects trigger population, development growth in northern Johnson County – January 27, 2019

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