Highlights More than 30% of men (Generation Z and Millennials, in particular) reported feeling lonely in 2018 and this number is rising, with estimates as high as 45%. Low income, low education, unmarried, poor health status, and social isolation are known predictors of loneliness for men. Men benefit more from marriage than do women and fare less well than women when single or widowed. A dramatic rise in unmarried, unpartnered men coexists with the rise in male loneliness. H