Using publicly reported data from the Maryland State Department of Education (MSDE) and the Maryland Department of Health and Mental Hygiene (DHMH), this brief examines the relation between the number of Baltimore-born children and the subsequent kindergarten enrollment in Baltimore City Public Schools (City Schools). The authors use this birth information to make predictions about kindergarten enrollment into the future. They examine the number of babies born to Baltimore residents and then compare that number to the subsequent enrollment of five-year-old children in City Schools kindergarten. To be sure, each City Schools kindergarten cohort includes children who moved into the city after they were born, but the concept of enrollment rate is useful for understanding enrollment dynamics over time.