The map above shows Maine and New Jersey side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Maine vs New Jersey Geography
Land area: Maine has a land area of 30,845 square miles (79,888 km²), while New Jersey has 7,355 square miles (19,049 km²). Maine's land area is 4.2 times (319%) larger than New Jersey's.
Total area: Maine: 35,380 square miles (91,634 km²) vs New Jersey: 8,719 square miles (22,583 km²), including inland and coastal water. Maine's total area is 4.1 times (306%) larger than New Jersey's.
Length: Maine is 311 miles (501 km) long from north to south; New Jersey is 169 miles (271 km). Maine's north-south length is 1.8 times (84%) longer than New Jersey's.
Width: Maine spans 203 miles (327 km) east to west; New Jersey spans 129 miles (207 km). Maine's east-west width is 1.6 times (57%) wider than New Jersey's.
Highest point: Maine's highest point is Mount Katahdin at 5,253 feet (1,601 m); New Jersey's is High Point at 1,798 feet (548 m). Mount Katahdin is 3,455 feet higher than High Point.
Lowest point: Maine's lowest point is Atlantic Ocean at 0 feet; New Jersey's is Atlantic Ocean at 0 feet. Both lowest points are at or near sea level.
Maine vs New Jersey Population and History
Population: Maine has a population of 1,405,012 (2024), while New Jersey has 9,500,851 (2024). New Jersey's population is 6.8 times (576%) larger than Maine's.
Population density: Maine: 45.6 people per square mile vs New Jersey: 1,291.8. New Jersey's population density is 28.3 times higher than Maine's.
Biggest city: Maine's biggest city is Portland with 69,568 people; New Jersey's is Newark with 317,303. Newark's population is 4.6 times (356%) larger than Portland's.
Largest metro area: Maine's largest metropolitan area is Portland-South Portland, ME metro area (571,534 people) vs New Jersey's New York-Newark-Jersey City, NY-NJ metro area (19,940,274). New York-Newark-Jersey City, NY-NJ metro area's population is 34.9 times larger than Portland-South Portland, ME metro area's.
History: Maine: Admitted to the Union on March 15, 1820, as the 23rd state. New Jersey: Admitted to the Union on December 18, 1787, as the 3rd state. In its current form, New Jersey is the older of the two by 33 years.
Maine vs New Jersey Economy
GDP: Maine's GDP is $99.2 billion (2024) vs New Jersey's $846.0 billion. New Jersey's economic output is 8.5 times (753%) larger than Maine's.
GDP per capita: Maine: $70,586 per person vs New Jersey: $89,045. New Jersey's GDP per capita is 1.3 times (26%) higher than Maine's.
Average income: Maine: $68,932 vs New Jersey: $84,893 average income per person (per capita personal income). New Jersey's average income is 1.2 times (23%) higher than Maine's.
Maine vs New Jersey Counties
Number of counties: Maine has 16 counties, while New Jersey has 21. New Jersey's county count is 1.3 times (31%) higher than Maine's.
Biggest county by area: Maine's largest county is Aroostook County at 6,671 square miles; New Jersey's is Burlington County at 799 square miles. Aroostook County's land area is 8.3 times (735%) larger than Burlington County's.
Smallest county by area: Maine: Sagadahoc County (254 sq mi) vs New Jersey: Hudson County (46 sq mi). Sagadahoc County's land area is 5.5 times (450%) larger than Hudson County's.
Most populous county: Maine: Cumberland County (313,809 people) vs New Jersey: Bergen County (978,641 people). Bergen County's population is 3.1 times (212%) larger than Cumberland County's.
Least populous county: Maine: Piscataquis County (17,432 people) vs New Jersey: Salem County (65,874 people). Salem County's population is 3.8 times (278%) larger than Piscataquis County's.
Richest county: Maine: Cumberland County ($90,142 per capita income) vs New Jersey: Somerset County ($121,042). Somerset County's income is 1.3 times (34%) richer than Cumberland County's.
Poorest county: Maine: Franklin County ($52,725 per capita income) vs New Jersey: Cumberland County ($50,843). Franklin County and Cumberland County have about the same income.
Maine vs New Jersey Taxes
State income tax: Maine has a top income tax rate of 7.15%, while New Jersey has a top income tax rate of 10.75%. New Jersey's top rate is 3.6 percentage points higher.
Property tax: Maine: 0.91% effective rate vs New Jersey: 1.89% of home value per year. New Jersey's rate is 0.98 percentage points higher.
Sales tax: Maine: 5.5% combined state and average local rate vs New Jersey: 6.6%. New Jersey's combined rate is 1.1 percentage points higher.
Official Websites
Maine official website · New Jersey official website
More Size Comparisons
All Maine size comparisons · All New Jersey 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.