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Johnson County, AR, exhibits a modest population growth rate of 0.3% over the past year, slightly below the state average of 0.4%. With a median age of 39.0 years, it is comparable to nearby counties like Sebastian (38.0) and Pulaski (37.7), indicating a relatively mature demographic. The county's age dependency ratio of 70.6 is higher than the state average of 67.5, suggesting a greater proportion of dependents. Notably, 24.7% of the population is under 18, which is above the state average, indicating a youthful demographic segment. Overall, Johnson County reflects trends of stability and moderate growth within Arkansas.