The armed forces pay the best....by far. $45k+, they have good benefits too. There is the whole 'enlistment' thing, but if you were going that route anyway, it'd be a no-brainer to go for one of their sites. My buddy did the navy internship a few years ago and really really liked it. They offered him some assurances with training and whatnot, but that stuff is always TBD, so that is always something to think about.
Forensic/ Federal Prison sites pay very too. Most everything else has poor stipends.
My irony is that the two places I'd least want to practice pay the most. 🙄
-t