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SDG 11 is to: "Make cities and human settlements inclusive, safe, resilient, and sustainable". The number of slum dwellers reached more than 1 billion in 2018, or 24 per cent of the urban population. The number of people living in urban slums is highest in Eastern and South-Eastern Asia, sub-Saharan Africa and Central and Southern Asia. In 2019, only half of the world's urban population had convenient access to public transport, defined as living within 500 metres' walking distance from a low-capacity transport system (such as a bus stop) and within 1 km of a high-capacity transport system (such as a railway). In the period 1990–2015, most urban areas recorded a general increase in the extent of built-up area per person.
SDG 11 has 10 targets to be achieved, and this is being measured with 15 indicators. The seven "outcome targets" include safe and affordable housing, affordable and sustainable transport systems, inclusive and sustainable urbanization, protection of the world's cultural and natural heritage, reduction of the adverse effects of natural disasters, reduction of the environmental impacts of cities and to provide access to safe and inclusive green and public spaces. The three "means of achieving" targets include strong national and regional development planning, implementing policies for inclusion, resource efficiency, and disaster risk reduction in supporting the least developed countries in sustainable and resilient building.