The map above shows Idaho and Mississippi side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs Mississippi Geography
Land area
- Idaho has a land area of 82,645 square miles (214,051 km²), while Mississippi has 46,925 square miles (121,534 km²).
- Idaho's land area is 1.8 times (76%) larger than Mississippi's.
Total area
- Idaho: 83,569 square miles (216,441 km²) vs Mississippi: 48,436 square miles (125,448 km²), including inland and coastal water.
- Idaho's total area is 1.7 times (73%) larger than Mississippi's.
Length
- Idaho is 483 miles (778 km) long from north to south; Mississippi is 337 miles (542 km).
- Idaho's north-south length is 1.4 times (43%) longer than Mississippi's.
Width
- Idaho spans 352 miles (566 km) east to west; Mississippi spans 340 miles (547 km).
- Idaho and Mississippi have about the same east-west width.
Highest point
- Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); Mississippi's is Woodall Mountain at 805 feet (245 m).
- Borah Peak is 11,826 feet higher than Woodall Mountain.
Lowest point
- Idaho's lowest point is Snake River at 718 feet; Mississippi's is Gulf of Mexico at 0 feet.
- Mississippi's lowest point is 718 feet lower.
Idaho vs Mississippi Population and History
Population
- Idaho has a population of 2,001,619 (2024), while Mississippi has 2,943,045 (2024).
- Mississippi's population is 1.5 times (47%) larger than Idaho's.
Population density
- Idaho: 24.2 people per square mile vs Mississippi: 62.7.
- Mississippi's population density is 2.6 times (159%) higher than Idaho's.
Biggest city
- Idaho's biggest city is Boise with 237,963 people; Mississippi's is Jackson with 141,449.
- Boise's population is 1.7 times (68%) larger than Jackson's.
Largest metro area
- Idaho's largest metropolitan area is Boise City, ID metro area (845,877 people) vs Mississippi's Memphis, TN-MS-AR metro area (1,339,345).
- Memphis, TN-MS-AR metro area's population is 1.6 times (58%) larger than Boise City, ID metro area's.
History
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd state.
- Mississippi: Admitted to the Union on December 10, 1817, as the 20th state.
- In its current form, Mississippi is the older of the two by 73 years.
Idaho vs Mississippi Economy
GDP
- Idaho's GDP is $129.0 billion (2024) vs Mississippi's $158.2 billion.
- Mississippi's economic output is 1.2 times (23%) larger than Idaho's.
GDP per capita
- Idaho: $64,457 per person vs Mississippi: $53,751.
- Idaho's GDP per capita is 1.2 times (20%) higher than Mississippi's.
Average income
- Idaho: $62,323 vs Mississippi: $52,074 average income per person (per capita personal income).
- Idaho's average income is 1.2 times (20%) higher than Mississippi's.
Idaho vs Mississippi Counties
Number of counties
- Idaho has 44 counties, while Mississippi has 82.
- Mississippi's county count is 1.9 times (86%) higher than Idaho's.
Biggest county by area
- Idaho's largest county is Idaho County at 8,478 square miles; Mississippi's is Yazoo County at 922 square miles.
- Idaho County's land area is 9.2 times (819%) larger than Yazoo County's.
Smallest county by area
- Idaho: Payette County (407 sq mi) vs Mississippi: Alcorn County (400 sq mi).
- Payette County and Alcorn County have about the same land area.
Most populous county
- Idaho: Ada County (535,799 people) vs Mississippi: Harrison County (213,730 people).
- Ada County's population is 2.5 times (151%) larger than Harrison County's.
Least populous county
- Idaho: Clark County (794 people) vs Mississippi: Issaquena County (1,295 people).
- Issaquena County's population is 1.6 times (63%) larger than Clark County's.
Richest county
- Idaho: Blaine County ($202,612 per capita income) vs Mississippi: Madison County ($90,668).
- Blaine County's income is 2.2 times (123%) richer than Madison County's.
Poorest county
- Idaho: Madison County ($29,485 per capita income) vs Mississippi: Issaquena County ($27,264).
- Madison County's income is 1.1 times (8%) richer than Issaquena County's.
Idaho vs Mississippi Taxes
State income tax
- Idaho has a top income tax rate of 5.3%, while Mississippi has a top income tax rate of 4%.
- Idaho's top rate is 1.3 percentage points higher.
Property tax
- Idaho: 0.43% effective rate vs Mississippi: 0.65% of home value per year.
- Mississippi's rate is 0.22 percentage points higher.
Sales tax
- Idaho: 6.03% combined state and average local rate vs Mississippi: 7.06%.
- Mississippi's combined rate is 1.03 percentage points higher.
Official Websites
Idaho official website · Mississippi official website
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More Size Comparisons
All Idaho size comparisons · All Mississippi 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.