New Strategist Press editorial director Cheryl Russell plumbs the data mine of the Census' Current Population Survey to look at single-person households by age-range.
Russell matches each of the Census age-groupings to a generational cohort, noting that Millennials are under age 39; Gen Xers are 39 to 50; Boomers are 51 to 69. Here's the breakdown:
Single-person households as a percent of total households by generation
Generation X: 19%
Baby Boomers: 30%
Older Americans: 49%