The District of Columbia Organic Act of 1871 is an Act of Congress that repealed the individual charters of the cities of Washington and Georgetown and established a new territorial government for the whole District of Columbia. Though Congress repealed the territorial government in 1874, the legislation was the first to create a single municipal government for the federal district.

The passage of the Residence Act in 1790 created a new federal district that would become the capital of the United States. Formed from land donated by the states of Maryland and Virginia, the capital territory already included two large settlements at its creation: the port of Georgetown, Maryland and the town of Alexandria, Virginia. A new capital city named in honor of President George Washington was founded to the east of Georgetown in 1791.

Shortly after establishing operations in the new capital, Congress passed the Organic Act of 1801, which organized the federal territory. The territory within the federal district east of the Potomac formed the new County of Washington, which was governed by a levy court consisting of seven to eleven Justices of the Peace appointed by the President, and was governed by Maryland law as of 1801. The area west of the river became Alexandria County which was governed by Virginia law. In addition, Congress allowed the cities of Washington, Alexandria and Georgetown to each maintain their own municipal governments. In 1846 Alexandria County was returned by Congress to the state of Virginia.

The outbreak of the American Civil War in 1861 led to notable growth in the capital’s population due to the expansion of the federal government and a large influx of emancipated slaves. By 1870, the District’s population had grown 75% to nearly 132,000 residents. Growth was even more dramatic within the County of Washington, where the population more than doubled as people escaped the crowded city.

The individual local governments within the District were insufficient to handle the population growth. Living conditions were poor throughout the capital, which still had dirt roads and lacked basic sanitation. The situation was so bad that some lawmakers in Congress even suggested moving the capital out further west, but President Ulysses S. Grant refused to consider the proposals.