In 1980, sole-person households totaled 18.2 million, 22.5% of all US households. By 2020, the number was 36.1 million and made up 28% of all households. Moreover, between 2010 and 2020, 44% of household growth was contributed by sole-person households. Between 2020 and 2030, 42% of household growth will be generated by sole-person households and they will number 41.2 million, or 29.3% of all households. Yet, house size increases!