This brief begins to address knowledge gaps of best practices for housing young adults in extended care, the housing options currently available to those young adults, and how those options vary across and within states in the US. It is based on information gathered from a purposive sample of officials from public child welfare agencies in states that have extended federally funded foster care to age 21 and from a group of stakeholders who attended a convening on the topic. After describing the methodology, this paper summarizes what was learned and offers suggestions for future research.