The map above shows California and Oklahoma side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
California vs Oklahoma Geography
Land area: California has a land area of 155,859 square miles (403,673 km²), while Oklahoma has 68,597 square miles (177,665 km²). California's land area is 2.3 times (127%) larger than Oklahoma's.
Total area: California: 163,694 square miles (423,965 km²) vs Oklahoma: 69,899 square miles (181,038 km²), including inland and coastal water. California's total area is 2.3 times (134%) larger than Oklahoma's.
Length: California is 761 miles (1,224 km) long from north to south; Oklahoma is 533 miles (857 km). California's north-south length is 1.4 times (43%) longer than Oklahoma's.
Width: California spans 706 miles (1,137 km) east to west; Oklahoma spans 490 miles (789 km). California's east-west width is 1.4 times (44%) wider than Oklahoma's.
Highest point: California's highest point is Mount Whitney at 14,484 feet (4,415 m); Oklahoma's is Black Mesa at 4,980 feet (1,518 m). Mount Whitney is 9,504 feet higher than Black Mesa.
Lowest point: California's lowest point is Death Valley at -279 feet; Oklahoma's is Little River at 289 feet. California's lowest point is 568 feet lower.
California vs Oklahoma Population and History
Population: California has a population of 39,431,263 (2024), while Oklahoma has 4,095,393 (2024). California's population is 9.6 times (863%) larger than Oklahoma's.
Population density: California: 253.0 people per square mile vs Oklahoma: 59.7. California's population density is 4.2 times (324%) higher than Oklahoma's.
Biggest city: California's biggest city is Los Angeles with 3,878,704 people; Oklahoma's is Oklahoma City with 712,919. Los Angeles' population is 5.4 times (444%) larger than Oklahoma City's.
Largest metro area: California's largest metropolitan area is Los Angeles-Long Beach-Anaheim, CA metro area (12,927,614 people) vs Oklahoma's Oklahoma City, OK metro area (1,497,821). Los Angeles-Long Beach-Anaheim, CA metro area's population is 8.6 times (763%) larger than Oklahoma City, OK metro area's.
History: California: Admitted to the Union on September 9, 1850, as the 31st state. Oklahoma: Admitted to the Union on November 16, 1907, as the 46th state. In its current form, California is the older of the two by 57 years.
California vs Oklahoma Economy
GDP: California's GDP is $4,048.1 billion (2024) vs Oklahoma's $263.7 billion. California's economic output is 15.4 times larger than Oklahoma's.
GDP per capita: California: $102,662 per person vs Oklahoma: $64,388. California's GDP per capita is 1.6 times (59%) higher than Oklahoma's.
Average income: California: $86,232 vs Oklahoma: $63,708 average income per person (per capita personal income). California's average income is 1.4 times (35%) higher than Oklahoma's.
California vs Oklahoma Counties
Number of counties: California has 58 counties, while Oklahoma has 77. Oklahoma's county count is 1.3 times (33%) higher than California's.
Biggest county by area: California's largest county is San Bernardino County at 20,068 square miles; Oklahoma's is Osage County at 2,247 square miles. San Bernardino County's land area is 8.9 times (793%) larger than Osage County's.
Smallest county by area: California: San Francisco County (47 sq mi) vs Oklahoma: Marshall County (372 sq mi). Marshall County's land area is 8.0 times (696%) larger than San Francisco County's.
Most populous county: California: Los Angeles County (9,757,179 people) vs Oklahoma: Oklahoma County (816,490 people). Los Angeles County's population is 12.0 times larger than Oklahoma County's.
Least populous county: California: Alpine County (1,099 people) vs Oklahoma: Cimarron County (2,133 people). Cimarron County's population is 1.9 times (94%) larger than Alpine County's.
Richest county: California: Marin County ($190,891 per capita income) vs Oklahoma: Washington County ($126,749). Marin County's income is 1.5 times (51%) richer than Washington County's.
Poorest county: California: Trinity County ($42,191 per capita income) vs Oklahoma: Atoka County ($38,709). Trinity County's income is 1.1 times (9%) richer than Atoka County's.
California vs Oklahoma Taxes
State income tax: California has a top income tax rate of 13.3%, while Oklahoma has a top income tax rate of 4.5%. California's top rate is 8.8 percentage points higher.
Property tax: California: 0.71% effective rate vs Oklahoma: 0.75% of home value per year. Oklahoma's rate is 0.04 percentage points higher.
Sales tax: California: 9.03% combined state and average local rate vs Oklahoma: 9.06%. Oklahoma's combined rate is 0.03 percentage points higher.
Official Websites
California official website · Oklahoma official website
More Size Comparisons
All California size comparisons · All Oklahoma 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.