General Mariano Vallejo said the river was named Uba by an exploring expedition in 1824 because of the quantities of wild grapes (uvas silvestres in Spanish) that they found growing on its banks.

[10] Yuba is the most biodiverse county in the contiguous United States, with a documented 1,968 native vascular plant species per 10,000 square kilometres (3,860 sq mi),[11] and 2,772 total species verifiably observed.

[12] Flowering plant species include the yellow mariposa lily (Calochortus luteus).

[citation needed] This table includes the number of incidents reported and the rate per 1,000 persons for each type of offense: Yuba is a strongly Republican county in presidential and congressional elections.

The last Democratic presidential nominee to win a majority in the county was Jimmy Carter in 1976.

In the California State Legislature, the county is in the 4th Senate District, represented by Republican Marie Alvarado-Gil,[19] and the 3rd Assembly District, represented by Republican James Gallagher.

Yuba Sutter Transit operates local bus service, as well as commuter runs to downtown Sacramento.

Yuba County Airport is 3 miles (4.8 km) south of Marysville.

The 2010 United States census reported that Yuba County had a population of 72,155.

[36] The population ranking of the following table is based on the 2010 census of Yuba County.