2020 census As of the
2020 census, La Grande had a population of 13,026, and the median age was 35.1 years; 21.9% of residents were under the age of 18 and 17.4% were 65 years of age or older. For every 100 females there were 94.0 males, and for every 100 females age 18 and over there were 90.4 males age 18 and over. There were 5,464 households, of which 27.5% had children under the age of 18 living in them. Of all households, 39.3% were married-couple households, 20.8% were households with a male householder and no spouse or partner present, and 31.1% were households with a female householder and no spouse or partner present. About 33.4% of all households were made up of individuals and 13.7% had someone living alone who was 65 years of age or older. There were 5,395 households, of which 28.4% had children under the age of 18 living with them, 40.7% were
married couples living together, 11.7% had a female householder with no husband present, 4.6% had a male householder with no wife present, and 43.0% were non-families. 32.8% of all households were made up of individuals, and 11.6% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.93. The median age in the city was 32.8 years. 22.4% of residents were under the age of 18; 16% were between the ages of 18 and 24; 23.6% were from 25 to 44; 23.3% were from 45 to 64; and 14.8% were 65 years of age or older. The gender makeup of the city was 48.1% male and 51.9% female.
2000 census As of the census of 2000, there were 12,327 people, 5,124 households, and 2,982 families living in the city. The population density was . There were 5,483 housing units at an average density of . The racial makeup of the city was 92.92% White, 1.26% Asian, 0.90% Pacific Islander, 0.78% Native American, 0.68% African American, 1.40% from other races, and 2.07% from two or more races. Hispanic or Latino of any race were 2.77% of the population. There were 5,124 households, out of which 28.0% had children under the age of 18 living with them, 45.1% were married couples living together, 9.6% had a female householder with no husband present, and 41.8% were non-families. 32.2% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.93. In the city, the population was spread out, with 23.6% under the age of 18, 16.5% from 18 to 24, 23.9% from 25 to 44, 21.4% from 45 to 64, and 14.6% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 90.3 males. For every 100 females age 18 and over, there were 88.0 males. The median income for a household in the city was $31,576, and the median income for a family was $40,508. Males had a median income of $32,746 versus $21,930 for females. The
per capita income for the city was $16,550. About 8.3% of families and 15.2% of the population were below the
poverty line, including 10.0% of those under age 18 and 9.0% of those age 65 or over. ==Museums and other points of interest==