The Ukiah Daily Journal reports that the county's Board of Supervisors on Tuesday voted unanimously to make the declaration, citing an "imminent threat of disaster" from drought conditions.
The state Department of Water Resources said Mendocino is the first to request state drought assistance.
Officials hope the declaration will result in state funds and assistance in developing a drought plan.
Gov. Jerry Brown has convened a task force to help decide if a statewide drought emergency is warranted.
State water managers say they will be able to deliver just 5 percent of the water sought by municipal agencies and nearly a million acres of farmland.
The City of Roseville is yanking grass and replacing it with drought-resistant landscaping to conserve water. Roseville also offers homeowners a 'Cash For Grass' rebate program.
The City of Sacramento says water customers in 2014 "cut water use to the lowest level per person per day in 100 years."
Salmon rely on cool water temperatures and aquatic plants to survive. So California’s drought has hit them particularly hard. But UC Davis researchers have found one area where the fish are flourishing.
The United States Department of Agriculture says January is shaping up to be another dry month in the Lake Tahoe area and that signals an unprecedented fourth year of drought.
(AP) - Federal science officials say that for the third time in a decade, the globe sizzled to the hottest year on record.