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Jefferson County, AR, is experiencing a concerning population decline, with a 13-year compound annual growth rate (CAGR) of -1.31% and a one-year growth rate of -1.9%. The median age is 39.5, slightly above the state average of 38.4, indicating a relatively mature population. The county's age dependency ratio stands at 64.5, similar to other counties like Pulaski and Sebastian, but with a higher percentage of residents under 18 (21.5%) compared to the state average (23.1%). This trend of population decrease contrasts sharply with the growth seen in counties like Benton and Washington, highlighting potential socio-economic challenges in Jefferson County.