Check out tips for finding and apartment in DC just posted on the Cloture Club Blog:
Searching for the Holy Grail: An Apartment in DC
by Eric Wohlschlegel
Where do you go to find an apartment in DC? I get emails on this topic regularly from readers of my blog, The Cribline. There are a number of resources I consult, including the real estate section of the Washington Post
Whether you already live in Washington, are moving from somewhere else, or interning for the summer, I also suggest perusing Craigslist.com. It’s one of the best resources around.
On the site, you can find apartments, a room in a house, and sometimes even free housing in exchange for child care or elderly care.