The Head Start Act mandates that each Head Start grantee receive a monitoring review at least once every 3 years; each newly designated grantee be reviewed after the completion of its first year (and then at least once every 3 years thereafter); and all grantees that "fail to meet the standards" receive Follow-up reviews. Reviewers knowledgeable about Head Start conducted fiscal year (FY) 2019 reviews, with Review Leads (RLs) leading teams of reviewers, where appropriate. Each review was guided by the standardized methodology and the Monitoring Protocols, which guide reviewers' onsite activities in assessing program performance and compliance. This report presents a summary of the findings of fiscal year (FY) 2019 Head Start monitoring reviews, fulfilling the reporting requirement in Section 641A(f) of the Head Start Act, as amended in 2007. It highlights the enhancements made to the FY 2019 monitoring review system, summarizes grantee review outcomes, and describes the types of findings most commonly identified in FY 2019. [For the 2018 report, see ED633365.]