|Delaware is the second smallest state of the US after Rhode Island. It has a total land area of 2,490 square miles with a length of 96 miles and a width of 30 miles. It is among the least populated state of the country with a population of about 873,092 according to a 2008 estimate. However, it ranks very high in population density owing to high concentration of households in areas like New Castle County, which offers shelter to more than 60 percent of the people living in the state. In addition to New Castle County, the state has two other counties, namely Kent and Sussex. Delaware was among the 13 states that have participated in American Revolution and it was the first to ratify the Constitution of the US. The name of Du Pont family, founder of one the largest chemical companies of the world, is closely associated with the name of the state, as they were at the forefront of the economic and industrial development of Delaware. Among the cities of Delaware, Wilmington is the largest while Dover serves as the capital city of the state.