According to the United States Census Bureau, the Lenox CDP has a total area of 1.8 square miles (4.7 km2), of which 0.012 square miles (0.03 km2), or 0.53%, is water.
As of the census[5] of 2000, there were 1,667 people, 885 households, and 386 families residing in the CDP. The population density was 359.6 people/km2 (931 people/sq mi). There were 1,045 housing units at an average density of 225.4 units/km2 (584 units/sq mi). The racial makeup of the CDP was 97.66% White, 0.60% Black or African American, 0.06% Native American, 0.78% Asian, 0.36% from other races, and 0.54% from two or more races. Hispanic or Latino of any race were 1.74% of the population.
There were 885 households, out of which 15.9% had children under the age of 18 living with them, 34.6% were married couples living together, 7.7% had a female householder with no husband present, and 56.3% were non-families. 49.9% of all households were made up of individuals, and 29.7% had someone living alone who was 65 years of age or older. The average household size was 1.84 and the average family size was 2.69.
In the CDP, the population was spread out, with 15.4% under the age of 18, 4.7% from 18 to 24, 21.7% from 25 to 44, 24.6% from 45 to 64, and 33.7% who were 65 years of age or older. The median age was 51 years. For every 100 females, there were 71.3 males. For every 100 females age 18 and over, there were 67.4 males.
The median income for a household in the CDP was $35,662, and the median income for a family was $60,893. Males had a median income of $41,875 versus $35,208 for females. The per capita income for the CDP was $23,810. About 3.6% of families and 12.3% of the population were below the poverty line, including 6.7% of those under age 18 and 12.3% of those age 65 or over.