I was recently contacted by a MPA student looking for any resources on gov't-related summer internship.
Her ideal was federal government but she said open to all angles (state/local gov, gov't related nonprofits and consulting companies)
Great link - will share.
Any suggestions on state/local level?
Likely each state has it's own website. In Minnesota it is http://www.careers.state.mn.us/ Search on the term "internships" or "student workers".
At the local government level look for jobs labled as short term duration or extra-hire, typically they are the entry level jobs. Otherwise start networking, that's how we get the majority of our interns and is how I started 20 years ago.