Rising demands for electricity, stresses on generating systems, and concerns over environmental quality have led to increased interest in the potential benefits of energy efficiency options in a number of developing countries. In an effort to analyze electricity consumption patterns and the potential for conservation, the World Bank has managed the Pakistan Household Energy Strategy Study. One component of that study, the first of its kind in a developing country, has involved the collection of household metering and survey data to support the estimation of hourly demand regression equations and the development of energy efficiency simulation software, This manuscript summarizes the methods and results.