We examine the relationships between spatial patterns of single-mother households and the location and supply of public housing in the Tokyo ward area. Global Moran's I and Local Moran's I statistics using district-level data in 2000, 2005, 2010, and 2015 reveal the spatial clusters of single-mother households as well as their spatial patterns. While spatial clusters are largely located in the northern and eastern regions of the Tokyo ward area, some clusters are found in the central and western regions. The spatial clustering patterns have changed in several areas; between 2010 and 2015, the spatial clusters in Adachi Ward decreased, whereas those in Edogawa Ward increased noticeably. The proportions of single-mother households tend to be high in areas with public housing; however, the correlation between the proportions of single-mother households and the supply of public housing has weakened since 2005.