District of Columbia which is part of the United States, was founded in July 16, 1790. District of Columbia occupies the 51 place in terms of total area of the US. The area of the district is 176 square kilometers. The capital of District of Columbia is Washington. The population of District of Columbia amounts to 68 117 people and ranks 51 in terms of population of the US. The largest city is Washington. Our catalog contains 1 cities and 14 053 enterprises located in District of Columbia. Postal abbreviation or short name is DC.