2020 census As of the
2020 census, Osage Beach had a population of 4,637. The median age was 51.3 years. 14.8% of residents were under the age of 18 and 27.7% of residents were 65 years of age or older. For every 100 females there were 95.7 males, and for every 100 females age 18 and over there were 94.5 males age 18 and over. 98.8% of residents lived in urban areas, while 1.2% lived in rural areas. There were 2,187 households in Osage Beach, of which 20.3% had children under the age of 18 living in them. Of all households, 41.6% were married-couple households, 21.9% were households with a male householder and no spouse or partner present, and 28.1% were households with a female householder and no spouse or partner present. About 37.1% of all households were made up of individuals and 14.8% had someone living alone who was 65 years of age or older. Of the 2,038 households 19.9% had children under the age of 18 living with them, 44.3% were married couples living together, 8.0% had a female householder with no husband present, 5.0% had a male householder with no wife present, and 42.8% were non-families. 35.3% of households were one person and 13% were one person aged 65 or older. The average household size was 2.04 and the average family size was 2.57. The median age was 48.9 years. 15.8% of residents were under the age of 18; 8.6% were between the ages of 18 and 24; 20.2% were from 25 to 44; 31.3% were from 45 to 64; and 24% were 65 or older. The gender makeup of the city was 48.9% male and 51.1% female.
2000 census At the
2000 census there were 3,662 people, 1,687 households, and 1,035 families living in the city. The population density was . There were 4,055 housing units at an average density of . The
racial makeup of the city was 97.35% White, 0.76% African American, 0.41% Native American, 0.49% Asian, 0.16% from other races, and 0.82% from two or more races. Hispanic or Latino of any race were 1.20% of the total population. Of the 1,687 households 19.1% had children under the age of 18 living with them, 51.2% were married couples living together, 7.2% had a female householder with no husband present, and 38.6% were non-families. 31.6% of households were one person and 10.9% were one person aged 65 or older. The average household size was 2.09 and the average family size was 2.58. The age distribution was 16.0% under the age of 18, 7.4% from 18 to 24, 26.9% from 25 to 44, 29.3% from 45 to 64, and 20.3% 65 or older. The median age was 45 years. For every 100 females there were 96.8 males. For every 100 females age 18 and over, there were 94.9 males. The median household income was $38,448 and the median family income was $49,554. Males had a median income of $30,444 versus $21,440 for females. The per capita income for the city was $22,685. About 4.5% of families and 6.7% of the population were below the
poverty line, including 5.3% of those under age 18 and 6.4% of those age 65 or over. ==Education==