This note, based on the World Bank's Private Participation in Infrastructure (PPI) project database, reviews trends in infrastructure projects with private participation in low-income countries. Four main conclusions arise. Surprisingly, the proportion of countries with at least one project - eighty one percent - is higher among low-income, than middle-income countries. As in middle-income countries, most investment has been in telecommunications, or energy projects. However, in low-income countries, well over half the projects are greenfield. And the scale of private participation in low-income countries, lags far behind that in middle-income countries.