From the Bureau of Justice Statistics:
State Court Organization, 2011 is available at http://www.bjs.gov/index.cfm?ty=pbdetail&iid=4802
Presents 2011 data on the organization and operations of state trial and appellate courts and examines trends from 1980 through 2011.
Data Analysis Tool
Federal Criminal Case Processing is available at http://www.bjs.gov/fjsrc/
An interface that can be used to analyze federal case processing data within the criminal justice system. Users can generate various statistics on federal law enforcement, prosecution, courts, incarcerations, and title and section of the U.S. Criminal Code.