Osino is a census-designated place in along the Humboldt River in central Elko County, Nevada, United States. As of the 2018 United States Census American Community Survey it had a population of 661. Osino is located on Interstate 80 on the northern foothills of two mountain ranges: the Elko Hills and the Adobe Range. It is 9 miles northeast of Elko and 41 mileā¦Osino is a census-designated place in along the Humboldt River in central Elko County, Nevada, United States. As of the 2018 United States Census American Community Survey it had a population of 661. Osino is located on Interstate 80 on the northern foothills of two mountain ranges: the Elko Hills and the Adobe Range. It is 9 miles northeast of Elko and 41 miles southwest of Wells.