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Miller County, AR, is experiencing a slight population decline, with a -0.5% growth rate over the past year, contrasting with the state's modest growth of 0.4%. The county's median age is 39.9, slightly above the state average of 38.4, indicating a relatively mature population. The age dependency ratio of 67.2 suggests a significant proportion of dependents, similar to other counties like Sebastian and Greene. Notably, Miller County has a balanced sex ratio of 99.2, which is better than some neighboring counties. Overall, Miller County's demographic trends reflect challenges in population retention compared to more rapidly growing areas in Arkansas.