The annual National Deaf-Blind Child Count is the world's first and longest running count of children who are deaf-blind. Begun in 1986 on behalf of the U.S. Department of Education, it represents a collaborative effort between the National Center on Deaf-Blindness (NCDB) and state deaf-blind projects throughout the country, including those in the Pacific Trust territories, the Virgin Islands, and Puerto Rico. The annual child count helps identify state and national technical assistance needs for children who are deaf-blind, their families, and the providers and systems that serve them. Each year, state deaf-blind projects capture a point-in-time count of the number of children eligible for project services on December 1 as well as information about the special education services those children receive under the Individuals with Disabilities Education Act (IDEA), Part B or C. IDEA Part C covers early intervention for infants and toddlers with disabilities. IDEA Part B covers children and youth ages 3-21. The official count used in this report is the number of children included in the December 1 total who are eligible for state deaf-blind project services and receiving IDEA Part B or C services on that date. This enables comparison with the IDEA Part B and Part C counts reported to Congress on all children receiving special education services. State deaf-blind projects may serve a greater number of children over the course of the year. NCDB provides technical assistance to the state projects to help them conduct their counts and compiles the data into this national report. [For the 2019 report, see ED620022.]