Alaska vs California Size: How Much Bigger Is Alaska?

Alaska covers 570,641 square miles of land. California covers 155,779 square miles. Alaska is 3.66× larger than California by land area — almost four Californias would fit inside one Alaska, with room to spare. By total area (including inland water bodies), the gap widens to 4.05×.

At a glance: Alaska vs California by the numbers

How much bigger is Alaska than California?

Alaska is 3.66 times larger than California by land area — 570,641 square miles versus 155,779 square miles, a difference of 414,862 square miles. Stated another way: almost four Californias would fit inside one Alaska, and you would still have roughly -52,475 square miles left over — an area larger than the entire state of Indiana.

When you include inland water bodies (which Census records as separate from land area), the ratio grows to 4.05×. Alaska's water area alone — 91,316 sq mi of lakes, rivers, and bays — is roughly 11.5× larger than California's entire water area, and would itself rank as the 13th-largest US state if it were dry land.

Alaska represents about 16.2% of all US land area. The contiguous 48 states plus DC together cover the remaining ~84%. Removing Alaska from the national total would shrink the United States from 4th-largest country in the world to roughly 5th — barely smaller than Brazil.

Drawn to scale: Alaska next to California

The tiled visual at the top shows the ratio as a count. Below is the same fact in a different frame: each state at its true shape, projected at the same area-per-pixel scale, side by side. Same data, two ways of seeing it.

The Mercator paradox: two distortions, pointing opposite directions

Most world maps use the Mercator projection, which inflates area at high latitudes. The scaling factor is sec²(latitude), so at:

• California's latitude band (32°N – 42°N) Mercator inflates visual area by roughly 1.4× to 1.8×.
• Alaska's latitude band (51°N – 71°N) Mercator inflates by 2.5× to over 9×.

So on standard world maps, Alaska looks even bigger than its true 3.66× California ratio — frequently appearing five to six times the size. This is the well-known Greenland-vs-Africa cartographic problem applied to US states.

Curiously, US national maps usually correct for this by treating Alaska as an inset — a smaller box, often dropped beneath the Gulf of Mexico or beside Hawaii in the lower-left. The inset trick fixes Mercator's high-latitude inflation but typically over-corrects: Alaska in these insets is often drawn at about one-third its true relative scale to keep the composite layout tidy. The result is that most Americans simultaneously believe two contradictory things about Alaska's size — that it's enormous (from world maps) and that it's comparable to a typical state (from US insets). The honest reality sits between them: Alaska is bigger than the next two largest US states combined, but not by quite as much as Mercator suggests.

The coastline difference: Alaska's hidden scale

If the area comparison is dramatic, the coastline comparison is almost absurd. Alaska has 6,640 miles of general coastline per NOAA's Office for Coastal Management — more than the rest of the United States combined. California's general coastline, by the same measurement standard, is 840 miles. The ratio is 7.9× — Alaska has nearly eight times more coastline.

Using the more granular "tidal shoreline" measurement (which follows every bay, inlet, fjord, and island), Alaska's number jumps to 33,904 miles — roughly 10× California's (3,427 miles). Drive the entire tidal shoreline of Alaska and you've covered more distance than driving from New York to Los Angeles eleven times.

Three geographic facts drive this: the Aleutian Island chain (1,200 miles of mostly uninhabited islands stretching west toward Russia), the Alexander Archipelago in the southeastern panhandle (1,100+ islands), and the deeply indented mainland coast where glacial fjords carve in for tens of miles. By contrast, California has a single, relatively smooth coastline running roughly straight north-south for about 800 miles.

Population and density: California's 53× advantage

Alaska's land area is enormous, but its population is small. The 2020 Census counted 736,081 Alaskans, ranking the state 48th of 50 by population — below only Vermont and Wyoming. California's 2020 population of 39,538,223 is roughly 53.7× larger.

Density compounds the contrast. California's density is roughly 253.7 people per square mile, the 11th-highest in the nation. Alaska's density is 1.29 per square mile, by far the lowest — Alaska is about 197 times less densely populated than California.

To put it in human terms: more people live in the city of San Diego (population ~1.39 million) than in the entire state of Alaska. Los Angeles County alone (~10 million people) has roughly 14× Alaska's total population living on 0.7% of Alaska's land. Alaska has more land per resident — about 775 square miles per thousand residents — than any other US state.

Highest, lowest, longest: the extremes

Both states hold "highest point" records, just on different scales.

• Highest point in North America: Denali (formerly Mt. McKinley) in Alaska, 20,310 ft / 6,190 m. Denali is more than 5,800 ft taller than California's tallest peak.
• Highest point in the contiguous US: Mt. Whitney in California, 14,505 ft. Whitney and Death Valley's lowest point are about 85 miles apart in a straight line — the closest "tallest peak to deepest depression" pair in North America.
• Lowest point in North America: Death Valley, California, at 282 ft below sea level. California is the only state with both the lower-48's highest peak and the continent's lowest land elevation.
• Top-20 US peaks by elevation: 17 of the 20 highest mountains in the United States are in Alaska. The other three are in California, Colorado, and Washington.
• State extent: Alaska's east-west span (Aleutian westernmost island to eastern panhandle) is roughly 2,500 miles — wider than the entire contiguous United States is north-to-south. California spans about 770 miles north-to-south.

What else is the size of Alaska? Country-equivalents

If Alaska were an independent country, it would rank roughly 19th-largest in the world by area — between Mongolia (605,000 sq mi) and Peru (496,000 sq mi). Some useful comparisons:

• Alaska is larger than France, Germany, and the United Kingdom combined (478,000 sq mi).
• Alaska is roughly the size of Iran minus an area the size of Belgium.
• Alaska is about 75% the size of Mexico (758,000 sq mi).
• Alaska is roughly 1.6× the size of Spain, 4.6× the size of the United Kingdom, or 6.1× the size of Greece.
• Alaska + Hawaii together make up the only two US states not part of the contiguous lower-48 — together they cover 577,000 sq mi, about the same as Mongolia.

What else is the size of California? Country-equivalents

California's 155,779 square miles puts it in the same size class as several mid-sized countries. If California were an independent country, it would rank approximately 60th in the world by area — roughly tied with Paraguay or slightly larger than Japan.

• California is essentially the same size as Japan (145,937 sq mi) — within 6%.
• California is larger than the United Kingdom (94,058 sq mi) by 65%.
• California is larger than Italy (116,348 sq mi) by 34%.
• California is roughly the size of Sweden (173,860 sq mi) minus an area the size of New Hampshire.
• California is slightly larger than Paraguay (157,048 sq mi) — within 1%.
• By GDP, California would rank as the world's 5th-largest economy (~$3.6 trillion, 2024), ahead of India, France, and the UK.

Why are they so different in size? A brief history

Both states are products of 19th-century US expansion, but their boundaries were drawn for very different reasons.

California (1850, the 31st state)

California was Mexican territory until 1848, when the Treaty of Guadalupe Hidalgo ended the Mexican-American War and transferred a vast swath of the present-day American Southwest to the United States. The discovery of gold at Sutter's Mill in January 1848 — just nine days before the treaty was signed — triggered the California Gold Rush. Statehood followed less than two years later, on September 9, 1850, as part of the Compromise of 1850. California's borders were drawn deliberately to include the Sacramento and San Joaquin Valleys (the agricultural heart), a deepwater Pacific port (San Francisco Bay), the Sierra Nevada gold country, and a portion of the southern desert reaching the Colorado River.

Alaska (1959, the 49th state)

Alaska was a Russian colony from 1733 until 1867, when US Secretary of State William H. Seward negotiated its purchase for $7.2 million — about $0.02 per acre, or roughly $140 million in 2026 dollars. Newspapers of the era mocked the deal as "Seward's Folly" or "Seward's Icebox." The 1896 Klondike Gold Rush, two World Wars (during which Alaska's strategic value to the Pacific theater became obvious), and the 1957 discovery of major oil reserves on the Kenai Peninsula gradually shifted public opinion. Alaska became the 49th state on January 3, 1959. Its borders are simply the boundaries of the original Russian colony as negotiated in the 1867 purchase treaty — which is why Alaska's eastern border with Canada follows the meridian of 141°W and its southeastern panhandle is a thin strip extending down the British Columbia coast.

10 surprising facts about Alaska vs California

1. Alaska has more coastline than the other 49 states combined. Alaska's 6,640 miles of general coastline exceeds the total for all other states (~5,500 miles).
2. Alaska is larger than the next two largest states combined. Texas + California = 417,011 sq mi; Alaska = 570,641 sq mi.
3. The Aleutian Islands cross the antimeridian. Alaska is technically the easternmost AND westernmost US state — Semisopochnoi Island sits at 179°46'E, putting it east of the date line at 180°.
4. California has more vehicle registrations than Alaska has total residents. ~31 million registered vehicles vs. 736,081 Alaskans.
5. One California county is bigger than nine US states. San Bernardino County, CA covers 20,105 sq mi — larger than Rhode Island, Delaware, Connecticut, Hawaii, New Jersey, New Hampshire, Vermont, Massachusetts, and Maryland.
6. Alaska's panhandle alone is bigger than 11 US states. The Southeast Alaska panhandle covers roughly 35,000 sq mi — comparable to Indiana.
7. Alaska contains 17 of the 20 highest US peaks. Denali, Mt. Saint Elias, Mt. Foraker, Mt. Bona, and Mt. Blackburn are all over 16,000 ft.
8. California has the highest peak and lowest point in the contiguous US, 85 miles apart. Mt. Whitney (14,505 ft) to Badwater Basin (-282 ft) — a 14,787 ft vertical drop.
9. Alaska has no county government. Instead it uses 19 organized boroughs and 11 unorganized census areas. Most of western and northern Alaska has no county-level government at all.
10. Alaska crosses two time zones; California stays in one. Alaska Standard Time covers most of the state; Hawaii-Aleutian Time covers the western Aleutians.

Quick reference: US states ranked by land area

Frequently asked questions

Related size comparisons

Other state comparison pages and tools in the SimpleMapLab library:

• Texas vs Alaska size comparison — Alaska is 2.18× larger than Texas; two Texases fit inside Alaska. (The largest-state question, settled.)
• Alaska vs Lower 48 size comparison — the contiguous US is 5.18× Alaska; five Alaskas fit inside the lower 48, with a partial left over.
• Texas vs California size comparison — Texas is 1.68× California by land, but California has 1.36× the people and a $1.2T-larger economy.
• California vs Florida size comparison — California is 2.91× Florida by land, but Florida has 60% more coastline and higher density.
• Delaware vs Rhode Island size comparison — America's two smallest states: Delaware is 1.88× larger, but Rhode Island has more people.
• California vs UK size comparison — California is 1.74× the UK; California's $3.9T economy exceeds the UK's $3.6T.
• Russia vs Canada size comparison — the world's two largest countries; Russia is 1.71× Canada.
• Open Alaska + California in the interactive Country Size Comparison tool — drag either state across the world map at true area scale, rotate them, layer in additional regions, and copy a share URL for the comparison.
• Alaska boroughs and census areas — complete list of all 30 Alaska county-equivalents with population, area, and seats.
• California counties — all 58 California counties with population, area, median income, and county seats.
• 100-mile radius around Juneau and Sacramento — how much of each state lives within day-trip range of the capital.
• The loneliest town in Alaska and California — Alaska is home to the most isolated inhabited places in the United States.
• Interactive US county map — all 3,143 US counties, sortable by area or population.

Suggested citation: SimpleMapLab (2026). Alaska vs California: How Much Bigger Is Alaska? Part of the SimpleMapLab Size Comparisons series. Retrieved from https://www.simplemaplab.com/size-comparisons/alaska-vs-california. Licensed under CC-BY 4.0.