October 3, 2026

Largest Cities in Orange County by Land Area

What are the largest cities in Orange County — not by population, but by actual land area? Here are the top five:

1. Irvine — 65.6 sq. mi.

2. Anaheim — 50.3 sq. mi.

3. Huntington Beach — 27.0 sq. mi.

4. Orange — 25.7 sq. mi.

5. Newport Beach — 23.8 sq. mi.

Irvine is more than 2.5× the land area of Newport Beach! Source: U.S. Census Bureau QuickFacts, land area in square miles, 2020, rounded to one decimal place.

If you're thinking about moving to Orange County and want help figuring out which city or neighborhood fits your lifestyle, reach out — Katherine is happy to help.

Have a question about the OC market?

Katherine is happy to talk through what you saw here and how it applies to your situation.