As part of the Reentry Housing Forum, "Reducing the Revolving Door of Incarceration and Homelessness in the District of Columbia," this paper presents the number of people who used jail only; shelter only; jail and shelter; jail, shelter, and Fire and Emergency Medical Services (FEMS); multiple spells in each, and a mental illness disability, for people using the D.C. Jail between October 1, 2004 and March 31, 2008, public emergency shelters between October 1, 2005 and September 30, 2007, and FEMS between January 1 and August 31, 2008.