I don't know of a list but I would think a university with a highly ranked poli sci or foreign service program would have lots of young alumni/ae in the area ie Georgetown, GW, W&L. In terms of graduate schools of government, newly minted MPAs and MPPs might be arriving from Fletcher and Kennedy.
__________________
....but some are more equal than others.
Or, you can get in contact with Alumni Relations at a given school (or find someone who went to that school to do it for you), since they track the top 5-10 cities their alumni end up in. I know for us, it's Boston, NYC, DC, San Francisco, and LA (in some order that changes depending on the year).