Data elicited by two questionnaires on the characteristics (numbers, nature, extent, and location) of the multihandicapped population under 21 years of age in California are presented. Based on replies by 613 programs (47% response) and estimated to include 80 to 90% of the state's multihandicapped blind children, statistics concern multihandicapped blind and deaf blind children, each in terms of the following categories: in school, in state hospital schools, not in school but of school age, and of preschool age. Further data treat severity and average number of handicaps as well as frequency of handicaps for 940 multihandicapped blind and 240 deaf blind children. (JD)