The world’s average saving rate has declined for the last two decades but country saving rates exhibit a large dispersion, especially in developing regions. While in a small number of developing countries saving has risen substantially (together with growth), saving has stagnated or even declined in most other developing countries. Countries that save more exhibit, on average, more stable saving rates over time. Country saving rates tend to rise with per capita real income levels and growth rates, domestic investment, public saving, money stocks, and private financial wealth. However substantial heterogeneity in correlations between saving and related variables is observed between industrial and developing countries. These and other findings on the performance of national, private, and household saving in industrial and developing economies are documented in this paper. JEL class.: E21, O16. Lopez, Loayza, and Serven: DECRG, The World Bank; Schmidt-Hebbel: Central Bank of Chile. We are grateful to Mita Chakraborty, George Monokroussos, and Douglas Smith for excellent research assistance.