Comparing the Net Census Undercount of Youngest Kids 2010-2020

A new report from Count All Kids compares the estimated net undercount of the youngest children in 2020 to the undercount of the youngest children in 2010 (ages 0 to 4).

As explained by statistician Deborah Griffin, “The 2010 Census edited birth dates of children born after April 1, 2010 (children that the census should have excluded) to birth dates in early 2010. These edits inflated the 2010 Census count of children born in January, February and March of 2010. The 2020 Census edits were revised and the final 2020 Census counts do not include children born after April 1, 2020. This brief adjusted the 2010 Census results to better approximate the enumeration errors of very young children in the 2010 Census. The adjusted 2010 Census net undercount estimates show that the youngest children (age 0) were the children with the greatest enumeration shortcomings in both the 2010 and the 2020 Census.

A More Meaningful Comparison of the 2010 and 2020 Census Estimates of Net Undercoverage of Young Children.” By Deborah H. Griffin. May 5, 2022