This is a loaded question, what I deem safe may or may not seem safe to you. I suggest you drive by the areas that you are interested in at night to get a feel of the area. You can also contact the local police station and ask them for guidance. There may also be a couple of websites that track crime by zip code or by various blocks; perhaps a google search of "crime stats for Dupont Circle DC may suffice.
It is not clear if you are looking to buy or to rent but if you are thinking about renting, you may be able to contact some of your classmates who are living in the area for guidance and maybe even the housing office of your school.... more