According to theU.S. Census Bureau, the county has a total area of 257 square miles (670 km2), of which 214 square miles (550 km2) is land and 43 square miles (110 km2) (17%) is water.[5]
U.S. Decennial Census[7] 1790-1960[8] 1900-1990[9] 1990-2000[10] 2010-2021[1]
As of thecensus[11] of 2000, there were 8,080 people, 2,898 households, and 2,043 families living in the county. Thepopulation density was 38 per square mile (15/km2). There were 4,189 housing units at an average density of 19 per square mile (7.3/km2). The racial makeup of the county was 91.86%White, 6.72%Black orAfrican American, 0.30%Native American, 0.17%Asian, 0.01%Pacific Islander, 0.40% fromother races, and 0.54% from two or more races. 0.73% of the population wereHispanic orLatino of any race.
The largest ancestry groups in Lyon County, Kentucky according to thecensus[11] of 2000 are:
There were 2,898 households, out of which 25.10% had children under the age of 18 living with them, 59.80% weremarried couples living together, 8.10% had a female householder with no husband present, and 29.50% were non-families. 26.80% of all households were made up of individuals, and 12.20% had someone living alone who was 65 years of age or older. The average household size was 2.26 and the average family size was 2.70.
The age distribution was 15.80% under the age of 18, 7.50% from 18 to 24, 32.90% from 25 to 44, 27.00% from 45 to 64, and 16.80% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 133.50 males. For every 100 females age 18 and over, there were 138.10 males.
The median income for a household in the county was $31,694, and the median income for a family was $39,940. Males had a median income of $36,034 versus $21,806 for females. Theper capita income for the county was $16,016. About 10.20% of families and 12.70% of the population were below thepoverty line, including 17.30% of those under age 18 and 13.30% of those age 65 or over.