Global cities are marked by precarity, yet little attention has been paid to the spatial overlap between work precarity among migrants and third sector organizations that sustain them. In this paper, we estimate the location of precarious work migrants in two global cities, London and Hong Kong, for both the 2001 and 2011 censuses, using a variety of spatial demographic and quantitative techniques, and then analyze the spatial overlap between this population and immigrant-serving third sector organizations. The results suggest both similarity, in particular between accommodation and work precarity, and difference, with an increasingly tenuous overlap in London by 2011.@en