The largest county in Hawaii
There are two right answers. By land area it is Hawaii County; by population it is Honolulu County. Which one you want depends on what you meant by largest.
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.
By land area
| Rank | Name | Land area | Population |
|---|---|---|---|
| 1 | Hawaii County | 4,028 sq mi | 210,043 |
| 2 | Maui County | 1,162 sq mi | 160,592 |
| 3 | Kauai County | 619.8 sq mi | 73,400 |
| 4 | Honolulu County | 600.8 sq mi | 988,703 |
| 5 | Kalawao County | 12.0 sq mi | 82 |
By population
| Rank | Name | Population | Density |
|---|---|---|---|
| 1 | Honolulu County | 988,703 | 1,646 per sq mi |
| 2 | Hawaii County | 210,043 | 52.1 per sq mi |
| 3 | Maui County | 160,592 | 138 per sq mi |
| 4 | Kauai County | 73,400 | 118 per sq mi |
| 5 | Kalawao County | 82 | 6.8 per sq mi |
And the smallest
More on Hawaii
Rebuilt from source data 30 August 2026. How these figures are produced.