A method and system for estimating energy consumption of a utility population includes organizing the utility population comprising energy consumers into a plurality of groups. Next, a distribution of energy consumption against the plurality of groups may be calculated. Subsequently, statistically representative groups based on the energy distribution and the plurality of groups may be determined. Data is then collected from the statistically representative groups at predefined intervals from a communications network. Energy consumption of the utility population may then be estimated based on the data collected from the statistically representative groups. The communications network comprises an advanced metering infrastructure (AMI) network.