The population density was 3,924.4 people per square mile (1,514.7/km2). There were 13,912 housing units at an average density of 1,485.3 per square mile (573.3/km2). The racial makeup of the city was 67.0% White, 2.8% African American, 1.7% Native American, 6.4% Asian American, 0.3% Pacific Islander, 14.4% from other races, and 2.4% from two or more races. 12.5% of the population were Hispanic or Latino of any race. The European population in Yuba City was 0.5% Romanian, 0.3% Italian, and 1.6% German. There were 13,290 households, out of which 36.7% had children under the age of 18 living with them, 47.6% were married couples living together, 14.3% had a female householder with no husband present, and 32.7% were "non-families." 26.5% of all households were made up of individuals, and 9.7% had someone living alone who was 65 years of age or older. The average household size was 2.70 and the average family size was 3.28. In the city, the population was spread out, with 29.0% under the age of 18, 10.7% from 18 to 24, 29.4% from 25 to 44, 18.7% from 45 to 64, and 12.2% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 95.5 males. For every 100 females age 18 and over, there were 91.7 males. The median income for a household in the city was $32,858, and the median income for a family was $39,381. Males had a median income of $34,303 versus $23,410 for females. The per capita income for the city was $15,928. 18.1% of the population and 14.5% of families were below the poverty line. Out of the total population, 24.8% of those under the age of 18 and 9.5% of those 65 and older were living below the poverty line. Bus service in Yuba City is provided by Yuba Sutter Transit. The city is served by two highways. California State Route 20 is the major east-west route, running to Marysville to the east, and Williams to the west.