Junction City is a city in Lane County, Oregon, United States. The population was 5,392 at the 2010 census. As of the census of 2000, there were 4,721 people, 1,823 households, and 1,170 families residing in the city. The population density was 3,405.1 people per square mile (1,311.4/km²). There were 1,921 housing units at an average density of 1,385.5 per square mile (533.6/km²). The racial makeup of the city was 91.21% White, 0.30% African American, 1.23% Native American, 0.59% Asian, 0.04% Pacific Islander, 3.66% from other races, and 2.97% from two or more races. Hispanic or Latino of any race were 8.28% of the population. There were 1,823 households out of which 34.4% had children under the age of 18 living with them, 50.5% were married couples living together, 10.1% had a female householder with no husband present, and 35.8% were non-families. 30.5% of all households were made up of individuals and 16.5% had someone living alone who was 65 years of age or older. The average household size was 2.51 and the average family size was 3.15.