The map above shows Iowa and New Jersey side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Iowa vs New Jersey Geography
Land area
- Iowa has a land area of 55,854 square miles (144,660 km²), while New Jersey has 7,355 square miles (19,049 km²).
- Iowa's land area is 7.6 times (659%) larger than New Jersey's.
Total area
- Iowa: 56,273 square miles (145,746 km²) vs New Jersey: 8,719 square miles (22,583 km²), including inland and coastal water.
- Iowa's total area is 6.5 times (545%) larger than New Jersey's.
Length
- Iowa is 216 miles (347 km) long from north to south; New Jersey is 169 miles (271 km).
- Iowa's north-south length is 1.3 times (28%) longer than New Jersey's.
Width
- Iowa spans 335 miles (539 km) east to west; New Jersey spans 129 miles (207 km).
- Iowa's east-west width is 2.6 times (160%) wider than New Jersey's.
Highest point
- Iowa's highest point is Hawkeye Point at 1,669 feet (509 m); New Jersey's is High Point at 1,798 feet (548 m).
- High Point is 129 feet higher than Hawkeye Point.
Lowest point
- Iowa's lowest point is Mississippi River at 480 feet; New Jersey's is Atlantic Ocean at 0 feet.
- New Jersey's lowest point is 480 feet lower.
Iowa vs New Jersey Population and History
Population
- Iowa has a population of 3,241,488 (2024), while New Jersey has 9,500,851 (2024).
- New Jersey's population is 2.9 times (193%) larger than Iowa's.
Population density
- Iowa: 58.0 people per square mile vs New Jersey: 1,291.8.
- New Jersey's population density is 22.3 times higher than Iowa's.
Biggest city
- Iowa's biggest city is Des Moines with 213,096 people; New Jersey's is Newark with 317,303.
- Newark's population is 1.5 times (49%) larger than Des Moines'.
Largest metro area
- Iowa's largest metropolitan area is Omaha, NE-IA metro area (1,001,010 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 19.9 times larger than Omaha, NE-IA metro area's.
History
- Iowa: Admitted to the Union on December 28, 1846, as the 29th 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 59 years.
Iowa vs New Jersey Economy
GDP
- Iowa's GDP is $265.8 billion (2024) vs New Jersey's $846.0 billion.
- New Jersey's economic output is 3.2 times (218%) larger than Iowa's.
GDP per capita
- Iowa: $81,998 per person vs New Jersey: $89,045.
- New Jersey's GDP per capita is 1.1 times (9%) higher than Iowa's.
Average income
- Iowa: $65,225 vs New Jersey: $84,893 average income per person (per capita personal income).
- New Jersey's average income is 1.3 times (30%) higher than Iowa's.
Iowa vs New Jersey Counties
Number of counties
- Iowa has 99 counties, while New Jersey has 21.
- Iowa's county count is 4.7 times (371%) higher than New Jersey's.
Biggest county by area
- Iowa's largest county is Kossuth County at 973 square miles; New Jersey's is Burlington County at 799 square miles.
- Kossuth County's land area is 1.2 times (22%) larger than Burlington County's.
Smallest county by area
- Iowa: Dickinson County (381 sq mi) vs New Jersey: Hudson County (46 sq mi).
- Dickinson County's land area is 8.2 times (724%) larger than Hudson County's.
Most populous county
- Iowa: Polk County (516,185 people) vs New Jersey: Bergen County (978,641 people).
- Bergen County's population is 1.9 times (90%) larger than Polk County's.
Least populous county
- Iowa: Adams County (3,606 people) vs New Jersey: Salem County (65,874 people).
- Salem County's population is 18.3 times larger than Adams County's.
Richest county
- Iowa: Mitchell County ($98,211 per capita income) vs New Jersey: Somerset County ($121,042).
- Somerset County's income is 1.2 times (23%) richer than Mitchell County's.
Poorest county
- Iowa: Decatur County ($46,134 per capita income) vs New Jersey: Cumberland County ($50,843).
- Cumberland County's income is 1.1 times (10%) richer than Decatur County's.
Iowa vs New Jersey Taxes
State income tax
- Iowa has a top income tax rate of 3.8%, while New Jersey has a top income tax rate of 10.75%.
- New Jersey's top rate is 6.95 percentage points higher.
Property tax
- Iowa: 1.29% effective rate vs New Jersey: 1.89% of home value per year.
- New Jersey's rate is 0.6 percentage points higher.
Sales tax
- Iowa: 6.94% combined state and average local rate vs New Jersey: 6.6%.
- Iowa's combined rate is 0.34 percentage points higher.
Official Websites
Iowa official website · New Jersey official website
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More Size Comparisons
All Iowa 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.