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Prof. Justin Levitt's Doug Spencer's Guide to Drawing the Electoral Lines

National Summary

We’re halfway through the 2021 redistricting cycle … and it’s still underway. As with each new cycle, there was new uncertainty right at the start: how the timing of Census data delivery will affect districting deadlines (including litigation about those deadlines); questions about who may serve as a commissioner to draw the lines; and even a controversy over a presidential memorandum on the apportionment count, later rescinded by a new administration, with several lawsuits filed in the meantime.  And then the uncertainty shifted to how the lines themselves were drawn (and, in many cases, redrawn).

As of June 26, 2025, there are live litigation challenges to lines in 11 states, and at least one (Ohio) where lines will have to be redrawn even without pending litigation.  There are pending fights over congressional lines in Alabama, Florida, Georgia, Louisiana, North Carolina, South Carolina, Texas, and Utah – and Ohio will have to redraw its lines before the 2026 cycle; and pending fights over state legislative lines in Alabama, Florida, Georgia, Louisiana, North Carolina, North Dakota, Tennessee, Texas, and Washington.  More than 225 cases with an impact on state legislative or congressional lines have been filed in the 2021 cycle; 35 are still pending.

In the 2011 cycle, courts struck all or part of congressional plans in five states, and drew the lines themselves in twelve states.  And courts struck all or part of state legislative plans in thirteen states, and drew the lines themselves in eight states.  We’ll see what the rest of the 2021 cycle brings.

Who Draws the Lines?




This map shows the institution with primary responsibility for drawing district lines.
This map shows the partisan alignment of the institution with responsibility for drawing district lines.
This map shows where the districting plan currently stands in each state.
This map shows the institution that drew the current district lines.

Party Control | Congress Lines

Control Across All States

Control By State

The table below shows the partisan control of bodies controlling Congress lines in the 2010 redistricting cycle. The first three column headers are sortable; click on the header to sort the data.

CSV

Download the table with full data about all cycles.

State Seats Legal Default Control Last Drawn By Control Governor Upper House Lower House