Ukiah, CA has a population of 15,884 and is the 2,694th largest city in the United States. The population density is 3,320 per sq mi which is 1329% higher than the California average and 3564% higher than the national average. The median age in Ukiah is 37 which is approximately 1% higher than the California average of 36. In Ukiah, 46% of the population over 15 years of age are married, 76% speak English and 20% speak Spanish. 68% of Ukiah residents were born in California, 18% were born out of state, 1% were born outside of the United States and 12% were foreign born.