If there is, it's well hidden as I've never seen such a site or listing of trustworthy rankings of all lawyers in the country or even in the jurisdictions in which I practice. There are handful of divorce attorneys in each place I practice who have a well known reputation among attorneys for being very good divorce attorneys (and who also, generally, charge higher fees than most, as a result of that reputation) and there are some others whom I know personally as being pretty good (and more reasonable rates). I give a list of both those groups to clients who ask for referrals to divorce attorneys. But I couldn't tell you how good or bad most of the other attorneys where I practice are and I have never seen any rankings of them that I would consider very reliable.
I can find out (and so can the public) which attorneys have been sanctioned by the state Supreme Court for misconduct, and of course I recommend people generally stay away from those attorneys unless, perhaps, the misconduct was not very serious and happened some time ago since people can learn from their mistakes. I also would stay away from the divorce lawyers (at least where I practice) who aggressively advertise, especially the ones that seem to make promises of outcomes or say things like they are "bull dog" lawyers. Those types tend to run a high volume business premised on quick settlements and not very good client service. Many good lawyers do marketing, but you can get a sense of the ones that might be the more suspect ones by the way in which they advertise. (Classy marketing, on the other hand, is no guarantee they are good, of course.)
In the end, though, the best way to find a good lawyer (or doctor, CPA, architect, etc) is by referrals from people you know who have had experience with them.
