Boston's SRO housing stock declined throughout the 20th century, but still house several thousand people today.

Licensed single-room occupancy units. Boston.

Note: 1885-1985 data are from "Lodging houses in Boston - A Different Approach," a 1986 Boston Redevelopment Authority report. 2024 data is composed of all Lodging House Licenses from City of Boston's Licensing Board Licenses dataset.
Chart: Boston IndicatorsSource: Boston Revelopment Authority, City of Boston Licensing BoardGet the dataCreated with Datawrapper