[7] The 2020 United States census counted 8,140 people, 3,316 households, and 2,237 families in Cumberland Hill.

27.5% of households consisted of individuals and 13.2% had someone living alone who was 65 years of age or older.

[13] The percent of those with a bachelor's degree or higher was estimated to be 34.1% of the population.

[9] The 2016-2020 5-year American Community Survey estimates show that the median household income was $94,773 (with a margin of error of +/- $18,500) and the median family income was $110,654 (+/- $12,490).

[17][18] As of the census[3] of 2000, there were 7,738 people, 3,054 households, and 2,204 families residing in the CDP.

The racial makeup of the CDP was 96.89% White, 0.39% African American, 0.03% Native American, 1.28% Asian, 0.04% Pacific Islander, 0.53% from other races, and 0.85% from two or more races.

23.4% of all households were made up of individuals, and 10.7% had someone living alone who was 65 years of age or older.