Young Children in the 2020 Census
Young children–defined as children under age five–have been undercounted for decades, disadvantaging their families, communities, and neighborhoods. In the 2010 Census, the net undercount rate for young children was 4.6 percent, and more than 2.2 million in this age group were not included in the census results. This is a higher net undercount rate than for any other age group. Even among other children, those under five years old are more likely to be missing from census data.