The map above shows Iowa and United Kingdom side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Iowa vs United Kingdom Geography
Land area: Iowa has a land area of 55,854 square miles (144,660 km²), while United Kingdom has 93,410 square miles (241,930 km²). United Kingdom's land area is 1.7 times (67%) larger than Iowa's.
Total area: Iowa: 56,273 square miles (145,746 km²) vs United Kingdom: 94,058 square miles (243,610 km²), including inland and coastal water. United Kingdom's total area is 1.7 times (67%) larger than Iowa's.
Length: Iowa is 216 miles (347 km) long from north to south; United Kingdom is 747 miles (1,202 km). United Kingdom's north-south length is 3.5 times (246%) longer than Iowa's.
Width: Iowa spans 335 miles (539 km) east to west; United Kingdom spans 429 miles (690 km). United Kingdom's east-west width is 1.3 times (28%) wider than Iowa's.
Highest point: Iowa's highest point is Hawkeye Point at 1,669 feet (509 m); United Kingdom's is Ben Nevis at 4,413 feet (1,345 m). Ben Nevis is 2,744 feet higher than Hawkeye Point.
Lowest point: Iowa's lowest point is Mississippi River at 480 feet; United Kingdom's is The Fens (Holme Fen) at -10 feet. United Kingdom's lowest point is 490 feet lower.
Iowa vs United Kingdom Population and History
Population: Iowa has a population of 3,241,488 (2024), while United Kingdom has 69,487,000 (2025). United Kingdom's population is 21.4 times larger than Iowa's.
Population density: Iowa: 58.0 people per square mile vs United Kingdom: 743.9. United Kingdom's population density is 12.8 times higher than Iowa's.
Biggest city: Iowa's biggest city is Des Moines with 213,096 people; United Kingdom's is London with 8,825,001. London's population is 41.4 times larger than Des Moines'.
Largest metro area: Iowa's largest metropolitan area is Omaha, NE-IA metro area (1,001,010 people) vs United Kingdom's London (10,416,420). London's population is 10.4 times larger than Omaha, NE-IA metro area's.
History: Iowa: Admitted to the Union on December 28, 1846, as the 29th state. United Kingdom: Formed as the United Kingdom of Great Britain and Ireland on January 1, 1801; took its current form in 1922. In its current form, United Kingdom is the older of the two by 45 years.
Iowa vs United Kingdom Economy
GDP: Iowa's GDP is $265.8 billion (2024) vs United Kingdom's $4,002.6 billion. United Kingdom's economic output is 15.1 times larger than Iowa's.
GDP per capita: Iowa: $81,998 per person vs United Kingdom: $57,602. Iowa's GDP per capita is 1.4 times (42%) higher than United Kingdom's.
Average income: Iowa: $65,225 vs United Kingdom: $54,550 average income per person (per capita personal income). Iowa's average income is 1.2 times (20%) higher than United Kingdom's.
Official Websites
Iowa official website · United Kingdom official website
More Size Comparisons
All Iowa size comparisons · All United Kingdom 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.