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The Kusilvak Census Area in Alaska exhibits a notably young demographic, with a median age of just 23.7 years, significantly lower than the state median of 35.3 years. This region has a high percentage of residents under 18 years (41.2%) and a low percentage of those above 65 years (6.1%), indicating a youthful population structure. The area also has the highest age dependency ratio (89.8) among its peers, suggesting a heavy reliance on the working-age population to support the young. In contrast, other counties like Bethel Census Area and Northwest Arctic Borough show similar youthfulness but with slightly lower dependency ratios.