The U.S. Census Bureau estimates the total population in 2013 for Jefferson County, Kentucky was 756,832. Approximately 105,529 are between the ages of 14 and 24 years. This chart displays the estimated populations for two age groups and genders.
Source: U.S. Census Bureau, Population Division, Annual Estimates of the Resident Population for Selected Age Groups by Sex for the United States, States, Counties: April 1, 2010 to July 1, 2013. Release Date: June 2014