2020 census
As of the 2020 census, Jenison had a population of 16,640. The median age was 39.2 years. 25.3% of residents were under the age of 18 and 21.3% of residents were 65 years of age or older. For every 100 females there were 94.6 males, and for every 100 females age 18 and over there were 90.5 males age 18 and over.[12][13]
100.0% of residents lived in urban areas, while 0.0% lived in rural areas.[14]
There were 6,222 households in Jenison, of which 31.8% had children under the age of 18 living in them. Of all households, 63.3% were married-couple households, 11.2% were households with a male householder and no spouse or partner present, and 22.6% were households with a female householder and no spouse or partner present. About 23.2% of all households were made up of individuals and 16.2% had someone living alone who was 65 years of age or older.[12]
There were 6,482 housing units, of which 4.0% were vacant. The homeowner vacancy rate was 0.5% and the rental vacancy rate was 16.7%.[12]
2000 census
As of the census[2] of 2000, there were 17,211 people, 5,975 households, and 4,863 families residing in the community. The population density was 2,940.8 inhabitants per square mile (1,135.4/km2). There were 6,065 housing units at an average density of 1,036.3 per square mile (400.1/km2). The racial makeup of the community was 98.84% White, 0.49% African American, 0.21% Native American, 0.85% Asian, 0.01% Pacific Islander, 0.53% from other races, and 0.87% from two or more races. Hispanic or Latino of any race were 1.77% of the population.
There were 5,975 households, out of which 39.8% had children under the age of 18 living with them, 73.5% were married couples living together, 5.8% had a female householder with no husband present, and 18.6% were non-families. 16.9% of all households were made up of individuals, and 10.1% had someone living alone who was 65 years of age or older. The average household size was 2.86 and the average family size was 3.24.
In the community, the population was spread out, with 28.9% under the age of 18, 7.8% from 18 to 24, 26.8% from 25 to 44, 24.0% from 45 to 64, and 12.5% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 93.5 males. For every 100 females age 18 and over, there were 90.5 males.
The median income for a household in the community was $56,426, and the median income for a family was $61,957. Males had a median income of $46,738 versus $28,204 for females. The per capita income for the community was $21,021. About 1.8% of families and 2.5% of the population were below the poverty line, including 3.1% of those under age 18 and 4.3% of those age 65 or over.
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