2020 census As of the
2020 census, Greenville had a population of 3,104. The median age was 49.1 years. 16.1% of residents were under the age of 18 and 25.8% of residents were 65 years of age or older. For every 100 females there were 100.4 males, and for every 100 females age 18 and over there were 105.8 males age 18 and over. 91.8% of residents lived in urban areas, while 8.2% lived in rural areas. There were 1,504 households in Greenville, of which 19.6% had children under the age of 18 living in them. Of all households, 43.9% were married-couple households, 26.1% were households with a male householder and no spouse or partner present, and 24.9% were households with a female householder and no spouse or partner present. About 38.7% of all households were made up of individuals and 15.4% had someone living alone who was 65 years of age or older. Of the 1,076 households 24.3% had children under the age of 18 living with them, 53.3% were married couples living together, 5.9% had a female householder with no spouse or partner present, 1.7% had a male householder with no spouse or partner present, and 39.2% were non-families. 34.5% of households were one person and 12.6% were one person aged 65 or older. The average household size was 2.16 and the average family size was 2.79. The age distribution was 21.1% under the age of 18, 3.7% from 18 to 24, 22.5% from 25 to 44, 28.8% from 45 to 64, and 24.0% 65 or older. The median age was 46.6 years. For every 100 females age 18 and over, there were 89.6 males.
Income and poverty According to the
American Community Survey, the median household income was in the CDP is $133,864, and the median family income is $159,632. The per capita income for the CDP was $109,521. None of the families and 2.5% of the population are living below the poverty line. Greenville and
Henlopen Acres are the two
richest places in Delaware, all but tied for highest personal incomes, averaging over $80,000 per annum. ==Education==