District of Columbia Newspapers and Obituaries
The first major newspaper in the area, the Daily National Intelligencer, began publication in 1800. The Family History Library has microfilm copies from 1800 to 1852 (FHL films 176483-564). A history of the paper is available, and the marriage and death notices found in it have been abstracted and published for 1806-1858 (FHL film 441391).
The Reference Division of the District of Columbia Public Library has The National Intelligencer from 1800 to 1869, The Evening Star from 1852 to the present, and The Washington Post from 1877 to the present.
District of Columbia Public Library: http://dclibrary.org/washingtoniana/