According to the US Energy Information Administration –

“In 2009, the average annual electricity consumption for a U.S. residential utility customer was 10,896 kWh, an average of 908 kilowatthours (kWh) per month. Louisiana had the highest annual consumption at 15,276 kWh and Maine the lowest at 6,252 kWh.”

According to the American Council for an Energy Efficient Economy (ACEEE) -

“American homes use almost 25% of the energy consumed in the United States. About 80% of that energy is used in single-family homes, 15% in multi-family homes (such as apartments and condos), and 5% in mobile homes. Although residential energy use has steadily increased over the past 25 years, it has increased at a slower rate than the rate of population increase. However, many efficiency gains are being offset by increases in the number of electronics and appliances in the average home. There are still many large opportunities for improvement, especially in areas such as whole-home performance and systems.”