| S.N. | County | FIPS Code | County Seat | Est. | Population | Area mi² | Area km² |
|---|---|---|---|---|---|---|---|
| 1 | Carson City | 510 | (Independent city) | 1969 | 55,916 | 144 | 373 |
| 2 | Churchill County | 1 | Fallon | 1861 | 24,909 | 4,929 | 12,766 |
| 3 | Clark County | 3 | Las Vegas | 1909 | 2,266,715 | 7,911 | 20,489 |
| 4 | Douglas County | 5 | Minden | 1861 | 48,905 | 710 | 1,839 |
| 5 | Elko County | 7 | Elko | 1869 | 52,778 | 17,182 | 44,501 |
| 6 | Esmeralda County | 9 | Goldfield | 1861 | 873 | 3,589 | 9,295 |
| 7 | Eureka County | 11 | Eureka | 1873 | 2,029 | 4,176 | 10,816 |
| 8 | Humboldt County | 13 | Winnemucca | 1861 | 16,831 | 9,658 | 25,014 |
| 9 | Lander County | 15 | Battle Mountain | 1862 | 5,532 | 5,494 | 14,229 |
| 10 | Lincoln County | 17 | Pioche | 1866 | 5,183 | 10,635 | 27,545 |
| 11 | Lyon County | 19 | Yerington | 1861 | 57,510 | 1,994 | 5,164 |
| 12 | Mineral County | 21 | Hawthorne | 1911 | 4,505 | 3,757 | 9,731 |
| 13 | Nye County | 23 | Tonopah | 1864 | 46,523 | 18,147 | 47,001 |
| 14 | Pershing County | 27 | Lovelock | 1919 | 6,725 | 6,009 | 15,563 |
| 15 | Storey County | 29 | Virginia City | 1861 | 4,123 | 264 | 684 |
| 16 | Washoe County | 31 | Reno | 1861 | 471,519 | 6,342 | 16,426 |
| 17 | White Pine County | 33 | Ely | 1869 | 9,580 | 8,877 | 22,991 |
