In 2015‑16, California provided early intervention services to about 41,000 infants and toddlers with special needs. These infants and toddlers either have a disability (such as a visual or hearing impairment) or a significant developmental delay (such as not beginning to speak or walk when expected). California’s early intervention system consists of three programs administered by two types of local agencies—schools and regional centers for persons with developmental disabilities. This report provides the first comprehensive analysis of this system since it was established in 1993. The report has three main sections. We first provide background on California’s early intervention system, then assess this system, and conclude by recommending several ways to improve the system.