The nation experienced a certain shift in age distributions over the last decade. With baby boomers moving on to retirement, millennials and Gen Xers began to make up the bulk of the working population.

To determine where the different demographic groups are more concentrated, Trulia created a report to see where the youngest and oldest places are in America. The report broke down county demographics into three categories: young (ages 0-19), working age (ages 20-64) and elderly (65+ years).  The report also compared the demographic makeup of each U.S. county in 2017 to that of 2010 to provide a look at how certain areas have gained or lost residents of various ages.

On average, people in the elderly population concentrated towards the South. There was also a significant amount of older Americans in the Pacific Northwest and parts of New England. Utah was the state with the highest concentration of children ages 0 to 19, in line with the state’s higher-than-average birth rate.

Miami-Dade County had a large working age population for the area at 61.5 percent, a 0.3 percent increase from 2010. The young population dropped from 24.7 percent to 22.6 percent by 2017, while the share of elderly residents increased from 14.1 percent to 16 percent. The median home value for Miami-Dade County was $293,800 in 2017.

Broward County had a slightly higher young and elderly population. The young demographic in the area dropped from 24.8 percent to 23.4 percent. The share of elderly residents increased from 14.3 percent to 16.2 percent. The working age group only saw a slight drop of 0.5 percent to 60.4 percent in 2017. Broward County had a median home value of $255,200 in 2017.