2020 census As of the
2020 census, Lucas had a population of 7,612. The median age was 42.1 years. 29.4% of residents were under the age of 18 and 11.8% of residents were 65 years of age or older. For every 100 females there were 104.6 males, and for every 100 females age 18 and over there were 101.3 males age 18 and over. There were 2,255 households in Lucas, of which 50.7% had children under the age of 18 living in them. Of all households, 84.0% were married-couple households, 6.9% were households with a male householder and no spouse or partner present, and 6.9% were households with a female householder and no spouse or partner present. About 6.6% of all households were made up of individuals and 3.2% had someone living alone who was 65 years of age or older. Of the 945 households 44.9% had children under the living with them, 83.2% were married couples living together, 4.0% had a female householder with no husband present, and 9.5% were non-families. 7.5% of households were one person and 1.8% were one person aged 65 or older. The average household size was 3.06 and the average family size was 3.22. The age distribution was 30.2% under 18, 5.3% from 18 to 24, 28.8% from 25 to 44, 29.1% from 45 to 64, and 6.6% 65 or older. The median age was 39 years. For every 100 females, there were 98.9 males. For every 100 females age 18 and over, there were 97.9 males. According to the 2000 census, the median household income was $100,220 and the median family income was $101,014. Males had a median income of $72,471 versus $38,182 for females. The per capita income for the city was $34,020. About 3.9% of families and 4.1% of the population were below the
poverty line, including 3.7% of those under age 18 and 5.0% of those age 65 or over. ==Schools==