Local councils vary in size, sometimes dramatically. Thatcher Woods Council in the western suburbs of Chicago, for example, consisted of eleven city blocks and a small county forest tract. Santa Ana's Orange County Council is defined by the borders of Orange County and encompasses a large, densely populated urban area. The Katahdin Area Council of north-central Maine consists of nearly 18,000 square miles and represents almost one-third of the population and two-thirds of the land area of the state of Maine; it is the largest council east of the Mississippi River. The Philippines Council encompassed the entire Philippines archipelago, making it one of the few councils that comprised an entire nation.