Litigation in the 2010 cycle

(Click here for a summary of which maps were struck/upheld in the 2010 cycle.)
(Click here for a summary of which maps were struck/upheld in the 2000 cycle.)
(Click for individual cases in the 2000, 1990, 1980 cycles.)

As of 8/1/19: active cases in 8 states
(5 affecting congress, 4 affecting state leg)
256 total cases filed, 16 still active

Redistricting status map

Suit filed  
All suits resolved  

Note: Under federal law, a three-judge federal trial court hears constitutional challenges to federal or state legislative districts or requests for preclearance, and these decisions are appealed directly to the U.S. Supreme Court. Federal appellate courts therefore tend to get involved only when there is no constitutional challenge or judicial preclearance request, or when only local districts are challenged.

Congress State legislature   Maps & Data   States      
     Current status      Current status            Alabama      Indiana      Nebraska      South Carolina
     Timing      Timing            Alaska      Iowa      Nevada      South Dakota
     Authority      Authority   Litigation        Arizona      Kansas      New Hampshire      Tennessee
          Institution           Institution            Arkansas      Kentucky      New Jersey      Texas
          Party control           Party control            California      Louisiana      New Mexico      Utah
     Criteria      Criteria   Reform        Colorado      Maine      New York      Vermont
               Connecticut      Maryland      North Carolina      Virginia
               Delaware      Massachusetts      North Dakota      Washington
               Florida      Michigan      Ohio      West Virginia
         Georgia      Minnesota      Oklahoma      Wisconsin
Overview of redistricting     Further resources        Hawaii      Mississippi      Oregon      Wyoming
Why it matters Redistricting criteria        My work        Idaho      Missouri      Pennsylvania  
Public engagement Preclearance        Tools        Illinois      Montana      Rhode Island