The United States faces an alarmingly high rate of maternal morbidity and mortality, distinguishing it from other high-income countries that have achieved decreases in these rates in recent years. U.S. maternal morbidity and mortality rates are disproportionate across racial, ethnic, socioeconomic, and geographic groups. Statistics on maternal health outcomes reveal that there are challenges to protecting both the lives and future health of birthing people and their children.Recognizing the urgency of this growing problem, the National Academies Board on Population Health and Public Health Practice convened a 2-day virtual workshop, Advancing Maternal Health Equity and Reducing Maternal Mortality. The workshop examined the current state of maternal health in the United States and explored the factors needed to help communities and health care systems become more effective in reducing maternal morbidity and mortality and improving health outcomes through the fourth trimester. This publication summarizes the presentations and discussions of the workshop.