The map above shows Idaho and New Jersey side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs New Jersey Geography
Land area
- Idaho has a land area of 82,645 square miles (214,051 km²), while New Jersey has 7,355 square miles (19,049 km²).
- Idaho's land area is 11.2 times larger than New Jersey's.
Total area
- Idaho: 83,569 square miles (216,441 km²) vs New Jersey: 8,719 square miles (22,583 km²), including inland and coastal water.
- Idaho's total area is 9.6 times (858%) larger than New Jersey's.
Length
- Idaho is 483 miles (778 km) long from north to south; New Jersey is 169 miles (271 km).
- Idaho's north-south length is 2.9 times (186%) longer than New Jersey's.
Width
- Idaho spans 352 miles (566 km) east to west; New Jersey spans 129 miles (207 km).
- Idaho's east-west width is 2.7 times (173%) wider than New Jersey's.
Highest point
- Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); New Jersey's is High Point at 1,798 feet (548 m).
- Borah Peak is 10,833 feet higher than High Point.
Lowest point
- Idaho's lowest point is Snake River at 718 feet; New Jersey's is Atlantic Ocean at 0 feet.
- New Jersey's lowest point is 718 feet lower.
Idaho vs New Jersey Population and History
Population
- Idaho has a population of 2,001,619 (2024), while New Jersey has 9,500,851 (2024).
- New Jersey's population is 4.7 times (375%) larger than Idaho's.
Population density
- Idaho: 24.2 people per square mile vs New Jersey: 1,291.8.
- New Jersey's population density is 53.4 times higher than Idaho's.
Biggest city
- Idaho's biggest city is Boise with 237,963 people; New Jersey's is Newark with 317,303.
- Newark's population is 1.3 times (33%) larger than Boise's.
Largest metro area
- Idaho's largest metropolitan area is Boise City, ID metro area (845,877 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 23.6 times larger than Boise City, ID metro area's.
History
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd 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 103 years.
Idaho vs New Jersey Economy
GDP
- Idaho's GDP is $129.0 billion (2024) vs New Jersey's $846.0 billion.
- New Jersey's economic output is 6.6 times (556%) larger than Idaho's.
GDP per capita
- Idaho: $64,457 per person vs New Jersey: $89,045.
- New Jersey's GDP per capita is 1.4 times (38%) higher than Idaho's.
Average income
- Idaho: $62,323 vs New Jersey: $84,893 average income per person (per capita personal income).
- New Jersey's average income is 1.4 times (36%) higher than Idaho's.
Idaho vs New Jersey Counties
Number of counties
- Idaho has 44 counties, while New Jersey has 21.
- Idaho's county count is 2.1 times (110%) higher than New Jersey's.
Biggest county by area
- Idaho's largest county is Idaho County at 8,478 square miles; New Jersey's is Burlington County at 799 square miles.
- Idaho County's land area is 10.6 times larger than Burlington County's.
Smallest county by area
- Idaho: Payette County (407 sq mi) vs New Jersey: Hudson County (46 sq mi).
- Payette County's land area is 8.8 times (781%) larger than Hudson County's.
Most populous county
- Idaho: Ada County (535,799 people) vs New Jersey: Bergen County (978,641 people).
- Bergen County's population is 1.8 times (83%) larger than Ada County's.
Least populous county
- Idaho: Clark County (794 people) vs New Jersey: Salem County (65,874 people).
- Salem County's population is 83.0 times larger than Clark County's.
Richest county
- Idaho: Blaine County ($202,612 per capita income) vs New Jersey: Somerset County ($121,042).
- Blaine County's income is 1.7 times (67%) richer than Somerset County's.
Poorest county
- Idaho: Madison County ($29,485 per capita income) vs New Jersey: Cumberland County ($50,843).
- Cumberland County's income is 1.7 times (72%) richer than Madison County's.
Idaho vs New Jersey Taxes
State income tax
- Idaho has a top income tax rate of 5.3%, while New Jersey has a top income tax rate of 10.75%.
- New Jersey's top rate is 5.45 percentage points higher.
Property tax
- Idaho: 0.43% effective rate vs New Jersey: 1.89% of home value per year.
- New Jersey's rate is 1.46 percentage points higher.
Sales tax
- Idaho: 6.03% combined state and average local rate vs New Jersey: 6.6%.
- New Jersey's combined rate is 0.57 percentage points higher.
Official Websites
Idaho official website · New Jersey official website
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More Size Comparisons
All Idaho 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.