As formal schooling is an important component of early childhood services, this indicator looks at the school enrollment rates of 3- to 5-year-olds using 2020 data from the Current Population Survey (CPS), October Supplement. This indicator also compares enrollment rates by various child and family characteristics, within the 3- to 4-year-old and 5-year-old age groups. Using 2019 data from the American Community Survey (ACS), this indicator also presents the enrollment rates for 3- to 5-year-olds by state. (author abstract)