This report presents data on children under age six who are experiencing homelessness at the national level and in the 50 States, the District of Columbia, and Puerto Rico. It uses data collected from 2018 to 2019 by the Administration for Children and Families (ACF) and the Office of the Assistant Secretary for Planning and Evaluation (ASPE) within the U.S. Department of Health and Human Services (HHS) and by the U.S. Department of Education (ED). It also includes publicly available data from the U.S. Census Bureau (Census), the U.S. Department of Housing and Urban Development (HUD) (2020), and from the Annie E. Casey Foundation (2018). In January 2016, ACF released "Early Childhood Homelessness 50-State Profiles" as part of an interagency early childhood workgroup of the U.S. Interagency Council on Homelessness (USICH), which included member agencies ACF and ASPE within HHS, ED, HUD, and the U.S. Department of Agriculture (USDA). ACF released a second state profile report in 2017 and then ED issued annual reports in 2018, 2019, and 2020. This 2018-19 report presents the data by jurisdiction to inform policymakers, practitioners, and researchers on young children experiencing homelessness. Homeless children and youths lack a fixed, regular, and adequate nighttime residence. Subtitle VII-B of the "McKinney-Vento Homeless Assistance Act" (McKinney-Vento) offers support for states, outlying areas, and the Bureau of Indian Education to ensure that children and youth experiencing homelessness have equal access to a free and appropriate public education. It was amended through the "Every Student Succeeds Act" in 2015, and is administered by ED. Having this data helps policymakers and the public understand the evolving prevalence and nature of early childhood homelessness. [For "Early Childhood Homelessness State Profiles: Data Collected in 2017-2018," see ED609095.]