The document summarizes the results of the 2015 City Prosperity Initiative report, which measures the sustainability and prosperity of cities using a City Prosperity Index (CPI). The CPI evaluates over 60 cities across six dimensions of productivity, infrastructure, quality of life, equity and inclusion, environmental sustainability, and governance. Most cities score in the moderately solid to solid range, with European cities tending to be most prosperous. The report provides the CPI scores and rankings of individual cities and analyzes prosperity trends by region. UN-Habitat created the CPI to help cities benchmark performance and identify policy priorities to improve prosperity.