When it comes to energy management, city and county governments are like families. For one thing, there can be a lot of differences--and a one-size energy management solution will definitely not fit all! Some are large. San Bernardino County is the largest county in the United States by area, encompassing 20,105 square miles. It's larger than each of the nine smallest states; larger, in fact, than the four smallest states combined! And some are small. Kalawao County in Hawaii is less than 12 square miles. The town of Lost Springs, WY, has a total area of 0.09 square miles, and a population of four, which makes the Brady Bunch look like a metropolis.