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St. Clair County, AL, exhibits a population growth rate of 1.4% over the past year, slightly above the state average of 0.6%. With a median age of 41.0 years, it is older than the state median of 39.3, indicating a relatively mature demographic. The county's age dependency ratio of 65.8 is comparable to nearby counties, suggesting a balanced population structure, though it leans towards a higher proportion of dependents. Notably, St. Clair's sex ratio of 99.2 is healthier than the state average of 94.7, reflecting a more balanced gender distribution.