If there's one thing millennials like to do, it's, well, be around other millenials.

And that's backed up by research from the Atlanta Regional Commission, which created maps showing where people between 18 and 34 years old rent and own homes throughout 10 counties.

The maps show that millennials, whether renting or buying, prefer to live as close to the heart of Atlanta as they can afford. Think Fulton, Cobb, DeKalb and Gwinnett counties.

No big surprise there.

However, a less-expected finding is that some choose to live in some of the very outermost counties, such as Carroll and Hall. The regional planning agency, which used data from the 2010-2014 American Community Survey, speculates that's because of students clustering around colleges.

This map shows the percentage of occupied housing units that are owned by millennials.

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Data shows that there are higher densities of millennial renters than owners. The greatest concentration of millennial homeowners peaks at 29 percent, while renters account for nearly 85 percent in some locations.

ajc.com

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"One thing to consider, however, is the fact that the heaviest concentrations of the region’s rental housing is also located in the urban core. Still, a good chunk of that is being rented by the millennial generation," the agency said.

The rest, apparently, are living with their parents.