The map above shows Massachusetts and Ohio side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Massachusetts vs Ohio Geography
Land area: Massachusetts has a land area of 7,801 square miles (20,204 km²), while Ohio has 40,859 square miles (105,824 km²). Ohio's land area is 5.2 times (424%) larger than Massachusetts'.
Total area: Massachusetts: 10,554 square miles (27,335 km²) vs Ohio: 44,826 square miles (116,098 km²), including inland and coastal water. Ohio's total area is 4.2 times (325%) larger than Massachusetts'.
Length: Massachusetts is 123 miles (198 km) long from north to south; Ohio is 291 miles (468 km). Ohio's north-south length is 2.4 times (137%) longer than Massachusetts'.
Width: Massachusetts spans 185 miles (297 km) east to west; Ohio spans 317 miles (510 km). Ohio's east-west width is 1.7 times (71%) wider than Massachusetts'.
Highest point: Massachusetts's highest point is Mount Greylock at 3,489 feet (1,063 m); Ohio's is Campbell Hill at 1,547 feet (472 m). Mount Greylock is 1,942 feet higher than Campbell Hill.
Lowest point: Massachusetts's lowest point is Atlantic Ocean at 0 feet; Ohio's is Ohio River at 455 feet. Massachusetts's lowest point is 455 feet lower.
Massachusetts vs Ohio Population and History
Population: Massachusetts has a population of 7,136,171 (2024), while Ohio has 11,883,304 (2024). Ohio's population is 1.7 times (67%) larger than Massachusetts'.
Population density: Massachusetts: 914.8 people per square mile vs Ohio: 290.8. Massachusetts' population density is 3.1 times (215%) higher than Ohio's.
Biggest city: Massachusetts's biggest city is Boston with 673,458 people; Ohio's is Columbus with 933,263. Columbus' population is 1.4 times (39%) larger than Boston's.
Largest metro area: Massachusetts's largest metropolitan area is Boston-Cambridge-Newton, MA-NH metro area (5,025,517 people) vs Ohio's Cincinnati, OH-KY-IN metro area (2,302,815). Boston-Cambridge-Newton, MA-NH metro area's population is 2.2 times (118%) larger than Cincinnati, OH-KY-IN metro area's.
History: Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state. Ohio: Admitted to the Union on March 1, 1803, as the 17th state. In its current form, Massachusetts is the older of the two by 15 years.
Massachusetts vs Ohio Economy
GDP: Massachusetts's GDP is $778.5 billion (2024) vs Ohio's $923.1 billion. Ohio's economic output is 1.2 times (19%) larger than Massachusetts'.
GDP per capita: Massachusetts: $109,095 per person vs Ohio: $77,684. Massachusetts' GDP per capita is 1.4 times (40%) higher than Ohio's.
Average income: Massachusetts: $93,607 vs Ohio: $64,464 average income per person (per capita personal income). Massachusetts' average income is 1.5 times (45%) higher than Ohio's.
Massachusetts vs Ohio Counties
Number of counties: Massachusetts has 14 counties, while Ohio has 88. Ohio's county count is 6.3 times (529%) higher than Massachusetts'.
Biggest county by area: Massachusetts's largest county is Worcester County at 1,511 square miles; Ohio's is Ashtabula County at 702 square miles. Worcester County's land area is 2.2 times (115%) larger than Ashtabula County's.
Smallest county by area: Massachusetts: Nantucket County (46 sq mi) vs Ohio: Lake County (229 sq mi). Lake County's land area is 5.0 times (397%) larger than Nantucket County's.
Most populous county: Massachusetts: Middlesex County (1,668,956 people) vs Ohio: Franklin County (1,356,303 people). Middlesex County's population is 1.2 times (23%) larger than Franklin County's.
Least populous county: Massachusetts: Nantucket County (14,670 people) vs Ohio: Vinton County (12,545 people). Nantucket County's population is 1.2 times (17%) larger than Vinton County's.
Richest county: Massachusetts: Nantucket County ($129,250 per capita income) vs Ohio: Delaware County ($96,573). Nantucket County's income is 1.3 times (34%) richer than Delaware County's.
Poorest county: Massachusetts: Hampshire County ($65,432 per capita income) vs Ohio: Noble County ($34,940). Hampshire County's income is 1.9 times (87%) richer than Noble County's.
Massachusetts vs Ohio Taxes
State income tax: Massachusetts has a top income tax rate of 9%, while Ohio has a top income tax rate of 2.75%. Massachusetts's top rate is 6.25 percentage points higher.
Property tax: Massachusetts: 1% effective rate vs Ohio: 1.22% of home value per year. Ohio's rate is 0.22 percentage points higher.
Sales tax: Massachusetts: 6.25% combined state and average local rate vs Ohio: 7.29%. Ohio's combined rate is 1.04 percentage points higher.
Official Websites
Massachusetts official website · Ohio official website
More Size Comparisons
All Massachusetts 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.