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What Is Gerrymandering?
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Infographic explaining gerrymandering using a grid of 50 people, shown as orange and purple squares, to demonstrate how different ways of drawing five districts can lead to either fair or gerrymandered election outcomes, with some maps reflecting voter proportions and others distorting them. Map of the contiguous United States showing current congressional district boundaries for the 119th Congress, with Massachusetts highlighted for state focus. Map of US states with redistricting activity 2024 to 2026 blue certain or possible Democrat gain red pink certain or possible Republican gain gray none Map of Wisconsin showing boundaries and numbers of its congressional districts for the 113th United States Congress, with major cities and lakes labeled.
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What Is Gerrymandering?: Media

The 2026 elections feature unprecedented redrawing of congressional maps. But what does gerrymandering mean?
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Images

Gerrymandering
The division of districts to produce either fair or gerrymandered results.
Encyclopædia Britannica, Inc./Kenny Chmielewski
District map, Wisconsin
U.S Department of the Interior

Interactives

Redistricting over time
This interactive shows how congressional districts have evolved throughout U.S. history
Encyclopædia Britannica, Inc.
Redistricting, 2025–26 style
While redistricting normally occurs only after each census, political divides had...
Encyclopædia Britannica, Inc.