The purpose of this brief is to report on the licensing requirements for child care centers for all 50 states and the District of Columbia. The term “state” will be used for all 51 jurisdictions. States may define child care centers differently in their licensing requirements. To categorize the types of center-based child care settings states regulate, the following definition is used: Child care services for fewer than 24 hours per day per child in a nonresidential setting, unless care in excess of 24 hours is due to the nature of the parent(s)’ work (National Center on Early Childhood Quality Assurance, 2015). In other briefs in this series, licensing requirements for family child care homes and group child care homes are addressed. Using data compiled from state child care licensing regulations, the National Center on Early Childhood Quality Assurance conducted an analysis that examines the state of licensing requirements in 2020 and identifies trends that have emerged since data were last collected in 2017. (author abstract)