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Yuma County, AZ, exhibits a modest population growth rate of 0.7% over the past year, which is below the state average of 1.3%. With a median age of 35.3, it is younger than the state median of 38.4, indicating a relatively youthful demographic. The county has a high percentage of residents under 18 (25.1%) compared to the state (22.2%), but a significant age dependency ratio of 81.2 suggests a substantial proportion of dependents. In comparison to neighboring counties like Maricopa and Pima, Yuma's growth and demographic profile highlight its unique position within Arizona's diverse regions.