In January 2016, the Administration for Children and Families (ACF) released the first 50-state profile on Early Childhood Homelessness as part of an interagency collaboration with multiple departments and agencies participating on the early childhood workgroup of the U.S. Interagency Council on Homelessness (USICH). This report updates ED's annual "Early Childhood Homelessness State Profiles" and provides a snapshot of early childhood data available for children who are experiencing homelessness in each state, plus the District of Columbia and Puerto Rico. It includes publicly available data for 2017-2018 from the U.S. Census Bureau (Census), ED, HUD, HHS, and the Annie E. Casey Foundation and reports the following by state: (1) Total population under age six in 2018; (2) Estimated number of children under age six experiencing homelessness in 2017-2018; (3) Estimated extent of homelessness (e.g., one-in-[X] children under age six experienced homelessness in 2017-2018); and (4) Estimated enrollment of children under age six in Federally funded early childhood programs (i.e., Head Start and school districts receiving "McKinney-Vento Homeless Assistance Act" ("McKinney-Vento Act") subgrants) in 2017-2018. As in previous profiles, the 2020 report includes two indicators referred to as related factors. These factors are the percentage of families experiencing a "high housing cost burden" (defined as spending 30 percent or more of monthly income on housing expenses), and the percentage of young children under age six with no parent in the labor force in the United States. These factors were included because of their relationship to homelessness and, in particular, to spark dialogue about addressing homelessness for children under age six. While these data on related factors are not available for the U.S. Virgin Islands, Guam, American Samoa, and the Commonwealth of the Northern Mariana Islands, this report does provide information about the number of children experiencing homelessness served by Head Start/Early Head Start in these areas. [For the 2019 report, see ED600425.]