Jefferson County, KY Demographics

The total population of Jefferson County is estimated to be 779,232 with 379,431 males (48.69%) and 399,801 females (51.31%). There are 20,370 more females than males in Jefferson County.
The median household income in Jefferson County was $66,620 in 2021, which marked an an increase of 676(1.03%) from $65,944 in 2020. This income is 89.30% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Jefferson County sees its highest median household income among householders in the age group of 45 to 64 years old, at $75,857. Overall, the median household income for the county of Jefferson County stands at $64,619.
In Jefferson County, the median income for all workers aged 15 years and older, regardless of work hours, was $43,491 for males and $32,000 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $60,368 for males and $50,415 for females.
In Jefferson County, the demographic landscape is diverse, spanning 7 distinct racial categories among households. Among these, Native Hawaiian and Other Pacific Islander households have the highest median household income at $130,391, while American Indian and Alaska Native households represent the opposite end with the lowest median household income of $43,651.
In 2022, the population of Jefferson County was 773,399, a 0.51% decrease year-by-year from 2021. Previously, in 2021, Jefferson County's population was 777,378, a decline of 0.69% compared to a population of 782,783 in 2020.
The median age in Jefferson County, KY is 38.4, as per 2021 ACS 5-Year Estimates. Of the total population, 18.50% were under the age of 15, 19.82% aged 15 to 29, 45.52% aged 30 to 64, 14.23% aged 65 to 84, and 1.92% were 85 years of age and older.
Racial distribution of Jefferson County population: 68.99% are White, 21.98% are Black or African American, 0.11% are American Indian and Alaska Native, 3% are Asian, 0.05% are Native Hawaiian and other Pacific Islander, 1.26% are some other race and 4.61% are multiracial.