The map above shows Maryland and Ohio side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Maryland vs Ohio Geography
Land area
- Maryland has a land area of 9,711 square miles (25,151 km²), while Ohio has 40,859 square miles (105,824 km²).
- Ohio's land area is 4.2 times (321%) larger than Maryland's.
Total area
- Maryland: 12,406 square miles (32,131 km²) vs Ohio: 44,826 square miles (116,098 km²), including inland and coastal water.
- Ohio's total area is 3.6 times (261%) larger than Maryland's.
Length
- Maryland is 231 miles (371 km) long from north to south; Ohio is 291 miles (468 km).
- Ohio's north-south length is 1.3 times (26%) longer than Maryland's.
Width
- Maryland spans 243 miles (391 km) east to west; Ohio spans 317 miles (510 km).
- Ohio's east-west width is 1.3 times (30%) wider than Maryland's.
Highest point
- Maryland's highest point is Hoye-Crest at 3,362 feet (1,025 m); Ohio's is Campbell Hill at 1,547 feet (472 m).
- Hoye-Crest is 1,815 feet higher than Campbell Hill.
Lowest point
- Maryland's lowest point is Atlantic Ocean at 0 feet; Ohio's is Ohio River at 455 feet.
- Maryland's lowest point is 455 feet lower.
Maryland vs Ohio Population and History
Population
- Maryland has a population of 6,263,220 (2024), while Ohio has 11,883,304 (2024).
- Ohio's population is 1.9 times (90%) larger than Maryland's.
Population density
- Maryland: 645.0 people per square mile vs Ohio: 290.8.
- Maryland's population density is 2.2 times (122%) higher than Ohio's.
Biggest city
- Maryland's biggest city is Baltimore with 568,271 people; Ohio's is Columbus with 933,263.
- Columbus' population is 1.6 times (64%) larger than Baltimore's.
Largest metro area
- Maryland's largest metropolitan area is Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489 people) vs Ohio's Cincinnati, OH-KY-IN metro area (2,302,815).
- Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's population is 2.8 times (180%) larger than Cincinnati, OH-KY-IN metro area's.
History
- Maryland: Admitted to the Union on April 28, 1788, as the 7th state.
- Ohio: Admitted to the Union on March 1, 1803, as the 17th state.
- In its current form, Maryland is the older of the two by 15 years.
Maryland vs Ohio Economy
GDP
- Maryland's GDP is $546.0 billion (2024) vs Ohio's $923.1 billion.
- Ohio's economic output is 1.7 times (69%) larger than Maryland's.
GDP per capita
- Maryland: $87,180 per person vs Ohio: $77,684.
- Maryland's GDP per capita is 1.1 times (12%) higher than Ohio's.
Average income
- Maryland: $79,259 vs Ohio: $64,464 average income per person (per capita personal income).
- Maryland's average income is 1.2 times (23%) higher than Ohio's.
Maryland vs Ohio Counties
Number of counties
- Maryland has 24 counties, while Ohio has 88.
- Ohio's county count is 3.7 times (267%) higher than Maryland's.
Biggest county by area
- Maryland's largest county is Frederick County at 661 square miles; Ohio's is Ashtabula County at 702 square miles.
- Ashtabula County's land area is 1.1 times (6%) larger than Frederick County's.
Smallest county by area
- Maryland: Baltimore city (81 sq mi) vs Ohio: Lake County (229 sq mi).
- Lake County's land area is 2.8 times (184%) larger than Baltimore city's.
Most populous county
- Maryland: Montgomery County (1,082,273 people) vs Ohio: Franklin County (1,356,303 people).
- Franklin County's population is 1.3 times (25%) larger than Montgomery County's.
Least populous county
- Maryland: Kent County (19,557 people) vs Ohio: Vinton County (12,545 people).
- Kent County's population is 1.6 times (56%) larger than Vinton County's.
Richest county
- Maryland: Montgomery County ($104,882 per capita income) vs Ohio: Delaware County ($96,573).
- Montgomery County's income is 1.1 times (9%) richer than Delaware County's.
Poorest county
- Maryland: Somerset County ($41,421 per capita income) vs Ohio: Noble County ($34,940).
- Somerset County's income is 1.2 times (19%) richer than Noble County's.
Maryland vs Ohio Taxes
State income tax
- Maryland has a top income tax rate of 6.5%, while Ohio has a top income tax rate of 2.75%.
- Maryland's top rate is 3.75 percentage points higher.
Property tax
- Maryland: 0.95% effective rate vs Ohio: 1.22% of home value per year.
- Ohio's rate is 0.27 percentage points higher.
Sales tax
- Maryland: 6% combined state and average local rate vs Ohio: 7.29%.
- Ohio's combined rate is 1.29 percentage points higher.
Official Websites
Maryland official website · Ohio official website
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More Size Comparisons
All Maryland size comparisons · All Ohio size comparisons
Area, elevation and boundary figures come from official national statistics and US Census Bureau and Natural Earth boundary data; US state population, economic, county and tax figures come from the US Census Bureau, the Bureau of Economic Analysis and the Tax Foundation. Figures are rounded and for general reference.