Washington D.C. is located in the Eastern United States. After New York and Philadelphia served as the US capitals respectively, on July 16, 1790, Congress took land belonging to the states of Maryland and Virginia and declared the city of Washington in the District of Columbia, the permanent capital of the United States. Washington D.C. has an estimated population of 684,498 people. There are many health professionals, gyms, and boutique fitness studios in Washington D.C. Parents who move to Washington D.C. can use Wellistic to find local providers to help them with their needs.