I’m sorry, but exercises like @85bears46 's above do more harm than good. He or she is describing micro differences between very small adjacent areas. Relative to one another, I think the descriptions are fairly accurate, but the way in which they are phrased – “safe to walk in day time but be much more alert at night”, “exercise caution at all times but especially after dark” – are designed to heighten concern. The places described that way are places where the majority of 3rd and 4th year students live every day, mostly without significant incident. They walk home after dark all the time, and then they may go to a friend’s apartment, then walk home again. They walk home from the Reg late. They’re not living in fear.
Are there muggings in Hyde Park? Sure there are. But there are thousands and thousands of people living there, and thousands and thousands more who come there to work every day, or to visit. The crime-by-random-stranger crime rate is just not that high per person. Chicago undergraduates are in much, much more danger from their fellow students and from themselves than they are from street criminals.
As far as I know, the last student actually killed anywhere near campus was an African graduate student who was shot outside his university-owned apartment building in the 6100 block (i.e., south of the Midway) of some street, near what is now (but was not then) the University Police headquarters, at about 1 am. The killer had previously robbed four other people that evening on and around the campus; he had traveled to Hyde Park from a neighborhood over five miles away. I don’t know the previous incident in which a student died because of street crime on or near campus, but it must have occurred more than 30 years ago.