This report presents indicators that are included in DC Action for Children's 2012 KIDS COUNT e-databook, their definitions and sources and the rationale for their selection. The indicators for DC KIDS COUNT represent a mix of traditional KIDS COUNT indicators of child well-being, such as the number of children living in poverty, and indicators of neighborhood well-being that are focused on neighborhood conditions. The indicators and measures reflect DC KIDS COUNT's neighborhood-centered analytical frame. Nearly all DC KIDS COUNT indicators and measures are calculated at the neighborhood level, which allows for the evaluation of the assets and needs of neighborhoods where DC's children live, play and learn. Indicators and measures were selected in consultation with local government officials, community advocates and experts, as well as the large body of literature on children's well-being in neighborhood contexts. (Contains 17 footnotes.)