Around 40 percent of Tanzania's urban population lived in slums in 2018, decreasing from 41.7 percent in 2016. In general, the share of the urban population living in poor settlements has been declining in Tanzania. In 2010, 63.5 percent of the urban inhabitants lived in slum households.

Tanzania TZ: Population Living in Slums: % of Urban Population data was reported at 50.700 % in 2014. This records a decrease from the previous number of 63.500 % for 2009. Tanzania TZ: Population Living in Slums: % of Urban Population data is updated yearly, averaging 66.400 % from Dec 1990 (Median) to 2014, with 7 observations. The data reached an all-time high of 77.400 % in 1990 and a record low of 50.700 % in 2014. Tanzania TZ: Population Living in Slums: % of Urban Population data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Tanzania – Table TZ.World Bank: Population and Urbanization Statistics. Population living in slums is the proportion of the urban population living in slum households. A slum household is defined as a group of individuals living under the same roof lacking one or more of the following conditions: access to improved water, access to improved sanitation, sufficient living area, and durability of housing.; ; UN HABITAT, retrieved from the United Nation's Millennium Development Goals database. Data are available at : http://mdgs.un.org/; Weighted Average;