Nevada County or its seat is Elko, a 4-letter word. Elko is a city in the northeastern part of Nevada, United States. It is the county seat of Elko County and the principal city of the Elko Micropolitan Statistical Area. Elko is the largest city for over 130 miles in all directions, making it an important regional center for commerce and transportation. It is home to Great Basin College, as well as branch offices for several major corporations.