2020 census As of the
2020 census, Oblong had a population of 1,371 and 433 families. The population density was . The median age was 44.0 years. 20.6% of residents were under the age of 18 and 25.4% of residents were 65 years of age or older. For every 100 females there were 91.5 males, and for every 100 females age 18 and over there were 81.9 males age 18 and over. 0.0% of residents lived in urban areas, while 100.0% lived in rural areas. There were 597 households in Oblong, of which 25.5% had children under the age of 18 living in them. Of all households, 41.5% were married-couple households, 18.3% were households with a male householder and no spouse or partner present, and 31.8% were households with a female householder and no spouse or partner present. About 35.1% of all households were made up of individuals and 19.3% had someone living alone who was 65 years of age or older. There were 663 housing units at an average density of . Of the housing units, 10.0% were vacant. The homeowner vacancy rate was 2.2% and the rental vacancy rate was 2.4%.
2000 census There were 766 households, out of which 36.7% had children under the age of 18 living with them, 40.60% were married couples living together, 10.84% had a female householder with no husband present, and 43.47% were non-families. 30.81% of all households were made up of individuals, and 12.01% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 1.90. The village's age distribution consisted of 20.8% under the age of 18, 8.0% from 18 to 24, 32.6% from 25 to 44, 19.3% from 45 to 64, and 19.1% who were 65 years of age or older. The median age was 34.9 years. For every 100 females, there were 92.4 males. For every 100 females age 18 and over, there were 81.3 males. The median income for a household in the village was $47,560, and the median income for a family was $49,279. Males had a median income of $33,208 versus $14,938 for females. The
per capita income for the village was $21,621. About 10.2% of families and 20.1% of the population were below the
poverty line, including 16.7% of those under age 18 and 12.4% of those age 65 or over. ==Arts and culture==