This report describes the distribution of young Californians by race/ethnic groups and socio-economic conditions, and compares trends using census data from 1970, 1980, 1990, and 2000. Classification of race/ethnic groups separates Hispanics from any race category (Whites, Asians, African Americans), as defined by the Census. The objective of the analysis is to understand the demographic patterns of the young population, as well as their participation rates in the educational system and the California labor market. This is important information for policy makers interested in designing programs that capture the abilities of the young to be used productively, or social programs that help them to improve their living conditions, including those that train them for jobs. This profile of young Californians may also help programs to set their target populations, by providing information on which areas and groups of young people are not currently integrated with the educational system or the labor market. Two tables are appended. (Contains 21 tables and 28 charts.)