Illinois is home to 4 percent of the nation’s children 0–5. It has a long history of commitment to early childhood, with more than $2.2 billion in federal and state dollars invested in programs serving young children. In addition to providing preschool programs for decades, Illinois has led the nation in investments in infants and toddlers, anchored by a long-standing commitment to funding home visiting and doula services and the birth-to-3 set[1]aside component of its State Board of Education early childhood education program. By law, a portion of each preschool dollar is invested into home visiting and center[1]based infant-toddler care. New leadership from governor J.B. Pritzker — who has a long history of philanthropic support for early childhood, with a focus on infants and toddlers — has increased momentum for additional investments. The following annual funding breakout, map, and program and service descriptions are not exhaustive of all early childhood expenditure but are intended to be a primer on the state’s complex early childhood system. (author abstract)