Fairfield County's population rose 0.2 percent between July of 2014 and July of 2015, according to estimates the U.S. Census Bureau released Thursday.
As in the previous year, Fairfield was the only county in the state that saw any growth.
Hartford is the only county aside from Fairfield with an increase in population compared to 2010. But after 2013, the county's population has been in sharp decline and is about 500 residents away from shrinking back to its 2010 level.
Litchfield County saw the biggest percent change in population, shrinking 0.7 percent between 2014 and 2015.
New Haven County had the biggest change in total residents — losing about 1,800 residents in that time frame.
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According to the census estimates, more residents are leaving Connecticut than are moving in. Even the number of international immigrants aren't making up for the number of those leaving.
In nearly all counties except Litchfield and Middlesex, the number of births outnumbered the number of deaths.