| Notes | Original Counties |
| Newlands Project 1902 | |
| Lake Tahoe to Carson Valley | |
| Named for a character in 'The Hunchback of Notre Dame' | |
| County Seat named after H.M. Yerington | |
| The Comstock Lode | |
| Reno named county seat in 1871 | |
| Unionville was 1st county seat | |
| Consolidated with Carson City in 1969 | |
| Ceded to Washoe County 1864 | |