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California vs UK Size: How Much Bigger Is California?

By SimpleMapLab·Published 15 May 2026·Reviewed against US Census + CIA Factbook·CC-BY 4.0

California covers 163,696 sq mi (423,970 km²). The UK covers 94,058 sq mi (243,610 km²). California is 1.74× larger — almost two UKs fit inside California. But the UK has 1.74× California's population— a perfect inverse. And California's GDP at $3.9T (5th-largest if a country) exceeds the UK's $3.6T (6th).

Diagram showing the UK overlaid inside California at true equal-area scale. California 163,696 sq mi; UK 94,058 sq mi; ratio 1.74×.California is 1.74× the size of the UKCalifornia 163,696 sq mi · UK 94,058 sq miCALIFORNIAUKsimplemaplab.com/size-comparisons/california-vs-uk · CC-BY 4.0
UK overlaid inside California at true equal-area scale. The UK covers ~57% of California's footprint; the leftover California area (about 70,000 sq mi) is the size of West Virginia + Maryland combined.
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At a glance: California vs UK by the numbers

MetricCaliforniaUKRatio
Total area (sq mi)163,69694,0581.74× CA
Population (2024)39,500,00068,700,0001.74× UK
Density (/sq mi)2547362.90× UK
GDP (2024)$3.9T$3.6T1.08× CA
Coastline (mi)8407,7239.19× UK
Highest point (ft)14,505 (Whitney)4,413 (Ben Nevis)3.29× CA
World rank (area)3rd US state80th country—

How much bigger is California than the UK?

California is 1.74× larger than the UK by total area — a difference of about 69,638 sq mi. That extra area, on its own, would rank as the world's 80th largest country — bigger than Bangladesh (~57,300 sq mi), Greece (~50,950 sq mi), or Iceland (~39,770 sq mi).

The perfect symmetry: California is 1.74× the UK's area, and the UK has 1.74× California's population. So the UK is exactly 3.03× denser (counting both ratios). California's density (254/sq mi) is dominated by the coastal metropolitan strip (LA, San Francisco, San Diego); inland California has vast empty mountain and desert areas. The UK has no equivalent empty zone — even the Scottish Highlands aren't truly uninhabited.

The economic gap: California's $3.9T vs UK's $3.6T

California is the world's 5th-largest economy if it were a country. Its 2024 GDP of $3.9 trillion beats the entire UK ($3.6T at #6), India ($3.7T), and France ($3.0T). Only Germany, Japan, China, and the USA are larger. The UK economy is the world's 6th-largest — but California, a single US state, exceeds it by 8%.

Per-capita, California is much wealthier in nominal terms: ~$99,000 per resident vs ~$52,000 in the UK. The gap reflects US-UK wage differences and California's concentration of high-margin industries: tech (Silicon Valley), entertainment (Hollywood), agriculture (Central Valley), and energy (Long Beach refineries).

Drawn to scale: California next to the UK

Both regions rendered at the same area-per-pixel scale, side by side.

Side-by-side equal-area: California (163,696 sq mi) next to UK (94,058 sq mi).California is 1.74× the area of the UKCalifornia163,696 sq miUnited Kingdom94,058 sq mi
California rendered with standard US Albers (parallels 29.5°N + 45.5°N); UK with parallels 50/58°N. Both equal-area-preserving.

What else is the size of California?

What else is the size of the UK?

10 surprising facts about California vs the UK

  1. California is 1.74× the UK. Almost two UKs fit inside California.
  2. The UK has 1.74× California's population. Perfect inverse of area ratio.
  3. California's GDP ($3.9T) exceeds the UK's ($3.6T). California is #5 economy if a country; UK is #6.
  4. The UK is 2.90× denser than California. 736 vs 254 people per sq mi.
  5. UK coastline is 9.2× California's. 7,723 mi vs 840 mi — UK is an island; California is one long Pacific edge.
  6. California's highest peak (Mt. Whitney 14,505 ft) is 3.3× Ben Nevis (4,413 ft).
  7. 10 US states are individually bigger than the UK. California is one of them; see also UK vs USA.
  8. California has more biological diversity than any other US state. Mediterranean, desert, alpine, and rainforest climates within state lines.
  9. California is bigger than every European country except Russia and Ukraine.
  10. California + UK populations would total 108 million. Bigger than Egypt, just under Vietnam.

Methodology and sources

Area: US Census 2020 (California) + CIA World Factbook 2024 (UK).

Population: US Census (CA), UK Office for National Statistics (UK).

Projections: California with standard US Albers (rotate 96°, parallels 29.5/45.5°N); UK with parallels 50/58°N. Both equal-area-preserving. Last reviewed 15 May 2026.

Frequently asked questions

Yes. California covers 163,696 sq mi (423,970 km²); the UK covers 94,058 sq mi (243,610 km²). California is 1.74 times larger by total area — bigger than the entire United Kingdom by about 70,000 sq mi (the size of West Virginia + Maryland combined).
California is 1.74× larger — a difference of about 69,638 sq mi. The two are NOT close: California's "extra" area (beyond UK size) alone is bigger than the state of Florida, or about the size of Cambodia.
California has the larger economy. California GDP (2024): $3.9 trillion — 5th-largest in the world if California were a country, ahead of the UK ($3.6T at #6) and behind Germany, Japan, China, and the USA. California's economy is 8% larger than the UK's. Per-capita: California ~$99,000 vs UK ~$52,000.
The UK has more people: approximately 68.7 million vs California's 39.5 million. The UK has 1.74× California's population — a perfect inverse of the area ratio. As a result, the UK is 2.90× denser (736 per sq mi vs California's 254).
No — California was Spanish (1769–1821), then Mexican (1821–1848), then a US territory and state (from 1850, the 31st state). The UK never controlled California, though British and US tensions over the Pacific Northwest (Oregon Country) were resolved by the 1846 Oregon Treaty. The closest UK-California connection is the Pacific Northwest border settlement.
Ten US states are individually larger than the UK: Alaska (6.07×), Texas (2.78×), California (1.74× — this article), Montana, New Mexico, Arizona, Nevada, Colorado, Oregon, and Wyoming. The remaining 40 states + DC are individually smaller than the UK.
California (163,696 sq mi) is bigger than every European country except Russia and Ukraine. It is approximately equal to Sweden (173,860 sq mi × 0.94), Finland (130,558 × 1.25), Norway (148,729 × 1.10), or Italy + Belgium combined. Two Californias = roughly Spain + France combined.
The UK (94,058 sq mi) is approximately the size of Oregon (98%), Romania (102%), Ghana (102%), or Guinea (99%). UK + Ireland combined is still smaller than California.
The UK has dramatically more coastline: 7,723 mi vs California's 840 mi — UK is 9.2× California by coast. As an island nation, the UK has coast in every direction. California's coast is one long Pacific edge (Oregon to Mexico, about 840 mi).
California spans Mediterranean (coastal), high desert (Mojave), alpine (Sierra Nevada), and rainforest (north coast) — extreme climate variety. The UK is uniformly temperate maritime — mild winters, cool summers, frequent rain. The UK's latitude (50–60°N) is matched in the US by southern Alaska — but the Gulf Stream keeps the UK far warmer.

Related size comparisons

Suggested citation: SimpleMapLab (2026). California vs UK Size. Retrieved from https://www.simplemaplab.com/size-comparisons/california-vs-uk. CC-BY 4.0.