The Camas Land Company platted Ukiah in August 1890. E. B. Gambee, who moved from Ukiah, California, to Oregon in 1881, suggested the name. DeWitt C. Whiting was the first postmaster in Ukiah, where a post office opened in September 1890.
As of the census of 2010, there were 186 people, 79 households, and 48 families residing in the city. The population density was. There were 122 housing units at an average density of. The racial makeup of the city was 90.3% White, 2.2% Native American, 3.2% Asian, 2.7% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 4.3% of the population. There were 79 households of which 25.3% had children under the age of 18 living with them, 46.8% were married couplesliving together, 7.6% had a female householder with no husband present, 6.3% had a male householder with no wife present, and 39.2% were non-families. 32.9% of all households were made up of individuals and 10.2% had someone living alone who was 65 years of age or older. The average household size was 2.11 and the average family size was 2.58. The median age in the city was 45 years. 28% of residents were under the age of 18; 8% were between the ages of 18 and 24; 14% were from 25 to 44; 29% were from 45 to 64; and 21% were 65 years of age or older. The gender makeup of the city was 53.2% male and 46.8% female.
2000 census
As of the census of 2000, there were 255 people, 96 households, and 69 families residing in the city. The population density was 1,201.0 people per square mile. There were 124 housing units at an average density of 584.0 per square mile. The racial makeup of the city was 95.29% White, 2.75% Asian, 1.18% from other races, and 0.78% from two or more races. Hispanic or Latino of any race were 1.57% of the population. There were 96 households out of which 33.3% had children under the age of 18 living with them, 60.4% were married couples living together, 5.2% had a female householder with no husband present, and 27.1% were non-families. 19.8% of all households were made up of individuals and 6.3% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 2.79. In the city, the population was spread out with 26.3% under the age of 18, 7.5% from 18 to 24, 27.5% from 25 to 44, 25.5% from 45 to 64, and 13.3% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 104.0 males. For every 100 females age 18 and over, there were 108.9 males. The median income for a household in the city was $34,773, and the median income for a family was $35,313. Males had a median income of $31,250 versus $25,625 for females. The per capita income for the city was $13,945. About 10.7% of families and 18.5% of the population were below the poverty line, including 12.0% of those under the age of 18 and 16.0% of those 65 or over.
