Homelessness is a reality for many families with young children in the United States. Homeless children and youths lack a fixed, regular, and adequate nighttime residence. In 2017, about a third of all people who stayed in a shelter were families with children, and nearly half of children served by the U.S. Department of Housing and Urban Development (HUD)-funded emergency and transitional housing providers were age five or younger (HUD, 2018). Furthermore, children under the age of one make up less than six percent of the overall child population in the United States, yet they constitute 10 percent of the child population served by HUD-funded shelters. In January 2016, the Administration for Children and Families (ACF) released "Early Childhood Homelessness 50-State Profiles" (ED609119) as part of an interagency early childhood workgroup of the U.S. Interagency Council on Homelessness (USICH). ACF released a second state profile in 2017 (ED609123) and then the U.S. Department of Education (ED) issued reports in 2018 (ED594740), 2019 (ED600425), and 2020 (ED609095). This report presents the five-year trend for publicly available data collected from 2013-14 to 2017-18 by ED, the U.S. Census Bureau (Census), HUD (2014 to 2018), and the Annie E. Casey Foundation (2013 to 2017). Its purpose is to inform policymakers, practitioners, and researchers on the change in the size and service coverage of young children experiencing homelessness during this five-year period. This report presents five-year trends using information from the previous reports covering data collected from 2013-14 to 2017-18 to provide a snapshot of children under age six who are experiencing homelessness at the national level. The data are from the 50 States, the District of Columbia, and Puerto Rico--limited information is also available for selected U.S. territories--and the following data are presented by state: (1) Number of children under age six by jurisdiction from 2014 to 2018 (Exhibit 1); (2) Number and percentage of children under age six experiencing homelessness by jurisdiction from 2013-14 to 2017-18 (Exhibit 2); and (3) Number and percentage of children under age six experiencing homelessness served by federally-funded education programs from 2013-14 to 2017-18 (i.e., Head Start and McKinney-Vento Homeless Assistance Act subgrants) (Exhibit 3). This report also includes two indicators on related factors: 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 (Exhibit 4).