OHIO

HISTORIC & PROJECTED GROWTH 1790 TO 2050

Sources: Census figures from U.S. Bureau of the Census & *Estimates from Weldon Cooper Center, Demographics Research Group

OHIO POPULATION DENSITY

Ohio Land Area - 40,861 square miles

YEAR
PEOPLE PER
SQUARE MILE
2020
288.8
2010
282.3
2000
277.8
1990
265.5
1980
264.3
1970
260.7
1960
237.5
1950
194.5
1940
169.1
1930
162.7
1920
141.0
1910
116.7

SOURCE: U.S. Bureau of the Census

Population by County

SOURCE: U.S. Bureau of the Census

Ohio Population News Articles

Clermont County wants to test air near Zimmer landfill to determine if it may harm resident – June 5, 2026

Are Governors Changing Course on State Data Center Policy? – June 4, 2026

Four dams holding back water as southwest Ohio manages ninth high-water event of 2026 – June 3, 2026

Where Central Ohio is growing the fastest may surprise you – June 1, 2026

Lawmakers fear Ohio EPA’s proposed data center permit could harm Lake Erie – Jan 21, 2026

Ohio farmers face weather whiplash – Feb 3, 2026

As air pollution rules sit idle, pressure grows on Cleveland City Council – Feb 3, 1926

Several immigration-related bills await Ohio lawmakers when they come back to work – Jan 28, 2026

Population growth leading to increase in emergency calls – Jan 14, 2026

Hamilton residents voice concerns about chemical plant emissions – Jan 14, 2026

Columbus officials stress water planning as region preps for population, data center boom – Oct 1, 2025

Water reservoirs key to Columbus’ growth as population booms – Sep 29, 2025

Campbell Soup admits to violating Clean Water Act 5,400 times, polluting river – Sep 18, 2025

Steel fallout creates complaints in one Tri-State city – Sep 15, 2025

Ohio drought conditions worsen across state. Will it ever rain? – Sep 11, 2025

Air Quality Alert for central Ohio expires – June 9, 2025

Cleveland population shows second year of estimated growth – May 28, 2025

A Toledo Blade investigation revealed radioactivity in the rural Ohio village of Luckey’s water – May 22, 2025

3 Ohio sheriff's departments ink agreements with ICE to aid in deportations – May 20, 2025

Climate change is already affecting Ohioans. Here's what comes next and what can be done – May 19, 2025

TNC applauds Gov. DeWine, Ohio Legislature for securing state’s energy future – May 15, 2025

As Columbus' population grows, city aims to improve traffic flow – Nov 21, 2024

Study Reveals Ohio’s Growing Struggle to Preserve Agricultural Land – Nov 14, 2024

6 Ohio Cities Named Among The 'Dirtiest Cities In America' – Nov 13, 2024

EPA awards Ohio $169M for water infrastructure improvements – Oct 30, 2024

Hundreds tackle population growth at Sustainability Summit – Oct 29, 2024

Extreme drought creeps into Franklin County, exceptional drought takes hold in Pickaway – Sept 6, 2024

Immigration FAQs – Aug 23, 2024

Sharon Lake project to resume after Great Parks approves plan to control drifting lime dust – Aug 21, 2024

Hidden Report Reveals How Workers Got Sick While Cleaning Ohio Derailment Site – Aug 14, 2024

90.3% of Ohio Lakes Are Too Polluted for Swimming – July 19, 2024

Ohio to clean up legacy pollution with $46 million in federal funding – June 14, 2024

6 large cities in Ohio experienced population growth last year. Here they are – May 27, 2024

Feds reach $310M settlement with Norfolk Southern after toxic Ohio train derailment. Here’s what else the company has to do – May 23, 2024

What new methane regulations mean for Ohio – May 21, 2024

Columbus grows again in 2023, according to new Census data, but by how much? -  May 18, 2024

Columbus City Council resolution lays path for zoning changes to bring more urban density – October 10, 2023

Hot weather drives Lake Erie toxic algae bloom resurgence – October 4, 2023

How Dangerous Are Ohio Lakes? – September 25, 2023

Clark County leaders work to provide driving education for local Haitians – September 24, 2023

New school vs. old trees: Is a Cleveland park protected from development? The Wake Up for Friday, Sept. 22, 2023 – September 22, 2023

Columbus sees momentum for local tree growing plan – September 20, 2023

Counties with the most farmland in Ohio – July 2, 2023

Columbus council approves more than $11.8M to design fourth water plant to improve capacity – June 27, 2023

Northeast Ohio expected to welcome thousands of Central American, South American refugees, asylum seekers – June 19, 2023

As Columbus population grows, John Glenn International Airport plans accordingly – June 14, 2023

The Largest Landfill in Ohio Is Almost as Tall as the Eiffel Tower – June 12, 2023

Cuyahoga County among Ohio counties where residents are most concerned about climate change - Yale study – December 14, 2022

10 Largest Cities In Ohio By Population – December 2, 2022

Ohio’s largest coal plant to change coal ash handling after U.S. EPA denial – December 2, 2022

New Research Dives into Fracking’s Impact on Water Flow in Ohio – December 2, 2022

Columbus vastly outpacing the rest of Ohio in population, growth – November 15, 2022

Climate Friday | Rainfall in Toledo becoming more intense – July 8, 2022

Where are the companies in Summit County emitting the most toxic chemicals? – July 7, 2022

Houseless population of Heer Park looking for a new home following eviction – June 22, 2022

Ohio State University: As Intel Expands Into Central Ohio, Communities Must Increase Housing, Planners Say – June 11, 2022

With inflation, supply-chain kinks, plight of Ohio food banks grows – March 5, 2022

Coastal workers migrating to Ohio – February 23, 2022

Central Ohio’s growth requires innovative housing solutions, planners say – February 22, 2022

Once sleepy Clermont County booms with subdivisions, new homes – February 16, 2022

Ohio to get $140 million for electric vehicle charging stations from bipartisan infrastructure bill – February 11, 2022

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