Ukiah ( /juːkaɪ.ə/ yew-ky-ə; formerly, Ukiah City) is the county seat and largest city of Mendocino County, California. With its accessible location (along the U.S. Route 101 corridor several miles south of CA 20), Ukiah serves as the city center for Mendocino County and much of neighboring Lake County. In 1996, Ukiah was ranked the #1 best small town to live in California and the sixth-best place to live in the United States. The population was 16,075 at the 2010 census.
Ukiah is located in the Ukiah Valley at 39°09′01″N 123°12′28″W / 39.15028°N 123.20778°W / 39.15028; -123.20778, with an elevation of 633 ft (193 m) above sea level.
According to the United States Census Bureau, the city covers an area of 4.7 square miles (12.2 km²), 98.89% of it land, and 1.11% of it water.