The bar chart illustrates how many US residents lived alone across five age brackets at fifty-year intervals from 1850 to 2000.
Overall, the proportion of people living alone increased across all age groups throughout the surveyed period, with the most significant growth seen among middle-aged and older-adults, particularly those aged 55 to 64.
In the earlier decades, living alone was relatively rare across all age groups. In 1850, the highest proportion was observed among those aged 55-64, at around 3%, while remaining cohorts differed only marginally from one another, at approximately 2%. By 1990, the 27-36 cohort was first recorded, at around 2%.
By mid-centuring, a more obvious gap between age categories emerged. The percentage of individuals aged under 54 rose modestly below 3% for both the 27-36 and 37-46 cohorts. Furthermore, the new age group 17-26 appeared, with a small proportion living alone, while the 55-64 climbed sharply to around 9%, marking a decisive shift in the overall pattern.
By 2000, solo living became widespread across every age demographic examined. The share of people aged 55-64 reached a peak of 17%, the highest figure on the chart. Similarly, the percentage of residents aged 47-54 rose considerably, reaching approximately 13%. In contrast, younger age groups show more moderate, about 5% for those aged 17-26 and 8% for the 27-36 cohort.