Redistricting Functions

Supreme Court’s Emergency Order Restores Alabama’s 2023 Congressional Map

By EditorJun 04, 2026

The Supreme Court on Tuesday night allowed Alabama to use a congressional map favoring Republicans in this year's elections, blocking a lower court ruling that the map intentionally discriminates against Black voters. The justices granted the state's emergency appeal to use a map it adopted in 2023 that has a majority-Black population in just one of its seven congressional districts. The three liberal justices dissented. The ruling takes effect immediately, meaning Alabama will use its 2023 map for its August 11 special primary elections covering the affected congressional districts. Unlike many shadow docket orders, the majority provided some explanation in…

Redistricting LitigationAlabama, caseupdates, Latest, mid-decade redistricting

Louisiana Enacts New Congressional Map Into Law, Eliminating One Majority-Black District

By EditorMay 29, 2026

Louisiana legislators gave their final approval Friday to Senate Bill 121, a congressional redistricting map that eliminates one of the state's two majority-Black districts and gives Republicans a probable additional U.S. House seat ahead of the November midterms. The state Senate approved the final version 28-10 on party lines after the House had passed it 66-36 the day prior. The new map redraws Democratic Rep. Cleo Fields' 6th District, clustering it around predominantly white communities in the Baton Rouge area and southern Louisiana, while adding part of Baton Rouge to the majority-Black 2nd District based in New Orleans, currently represented…

Enacting a Redistricting Map, Louisianalouisiana, mid-decade redistricting, policyindepth

Virginia’s Redistricting Ordeal: A Brief Summary

By EditorMay 26, 2026

Virginia's Post-2020 Redistricting: From Commission to Courtroom When Virginia voters approved a constitutional amendment in November 2020 establishing a bipartisan redistricting commission, it was widely seen as a model reform, a deliberate step away from partisan map-drawing toward a process governed by eight lawmakers and eight citizens working together. That promise quickly ran into reality: the commission deadlocked along partisan lines and missed its November 2021 deadline without producing a congressional map. The Virginia Supreme Court stepped in, appointed two special masters, one drawn from each party's nominees, and approved the resulting congressional map on December 28, 2021. That court-drawn…

Enacting a Redistricting Map, Virginiapolicyindepth, Virginia

Maryland Enacts State Voting Rights Act, with Local Elections at the Center

By EditorMay 25, 2026

Governor Wes Moore signed the Voting Rights Act of 2026 for Counties and Municipal Corporations (SB 255) into law on April 28, 2026, making Maryland the ninth state in the country to enact its own voting rights protections. The law directly targets local government electoral systems, prohibiting any county or municipal body from using an election method that dilutes or impairs a protected class's ability to elect candidates of their choice. To enforce the new standard, the Maryland Attorney General is authorized to investigate and sue local jurisdictions found to be operating such systems, while individual voters also gain a…

Local Redistricting, Marylandlocal-news, Maryland

From 1990 to 2030: A Short History of the Census Block-Boundary Suggestion Project

By EditorMay 22, 2026

The Block Boundary Suggestion Project (BBSP) is now in its fourth decade. It began as part of the Census Bureau's first nationwide Redistricting Data Program for the 1990 Census, following a 1984 pilot test that yielded positive results, which led to its full implementation. While census blocks were first used in 1940, only for cities of 50,000 or more inhabitants and other governments that contracted for the work, they were first used nationwide in 1990. Along with the nationwide census block-numbering system, which gave states the small-area geography they needed to meet Voting Rights Act obligations and minimal-population-deviation districting standards, BBSP helped move redistricting…

DATA and TECHNOLOGY, Local RedistrictingBBSP, dataindepth, localpage, U.S. Census Bureau

Why the 2030 Census LUCA Program Matters to Redistricting and GIS Staff

By EditorMay 16, 2026

Most redistricting discussions focus on the maps, who draws them, what criteria they must meet, and how they will hold up in court. But every redistricting map built from 2030 Census data will ultimately rest on a foundation that GIS and redistricting staff rarely talk about: the Census Bureau's residential address list. The Local Update of Census Addresses operation is the first to occur in every decennial census cycle, and it gives state, tribal, and local governments their only opportunity to directly help ensure an accurate enumeration by reviewing and submitting updates or corrections to the confidential address list before…

Census Data and Geography, Local Redistrictingdataindepth, local-admin, LUCA, U.S. Census Bureau

Five Census Bureau Tools Every Local Election Official Should Bookmark

By EditorMay 15, 2026

The Census Bureau offers a growing suite of free, browser-based tools that are directly useful for local election administration and redistricting work, and most officials don't know they exist. All five tools are free, require no account or login, and are updated regularly with the latest ACS and decennial census data. QuickFacts: The first stop for any local official should be QuickFacts, which delivers instant demographic snapshots; population, age, race, income, housing, etc., for any county, city, or town in the country with no data expertise required. TigerWeb: Next is TIGERweb, the Census Bureau's interactive boundary map viewer. TIGERweb allows users to…

Census Data and Geographydataindepth, localpage

What Is a Shapefile and Why Do You Need One for Redistricting?

By EditorMay 14, 2026

If you have spent any time around redistricting software or GIS professionals, you have probably heard the term "shapefile" and possibly nodded along without knowing what it means. A shapefile is a digital file format that stores the geographic boundaries of a defined area as a map layer. Think of it as the outline of a jurisdiction, your city limits, your county boundaries, your voting precincts, your census tracts, all saved in a format that mapping software can read, display, and analyze. TIGER boundary files are shapefiles from the Census Bureau that are important for drawing legally compliant district maps.…

Census Data and Geographylocal-admin

SCOTUS Denies Emergency Request to Block California Map Over Racial Gerrymandering Claims

By EditorFeb 04, 2026

The U.S. Supreme Court has cleared the way for California to implement a new congressional map for the upcoming midterm elections, denying an emergency request from state Republicans to block its use. Enacted through the voter-approved Proposition 50, which passed by a two-to-one margin in November, the plan is projected to help Democrats secure five additional seats in the U.S. House of Representatives. Although the California GOP and the Trump administration argued the map was an unconstitutional racial gerrymander, a lower federal court previously ruled that the evidence of racial motivation was "exceptionally weak" compared to the "overwhelming" evidence of…

California, Case UpdatesCalifornia, mid-decade redistricting, Prop 50

Virginia Mid-Decade Redistricting Update

By EditorFeb 01, 2026

Virginia’s mid-decade congressional map effort was halted by a Tazewell County circuit judge who said lawmakers didn’t follow the basic procedural rules for putting a constitutional amendment on the ballot. The state legislature's bid to install a new congressional map by constitutional amendment advanced in late October when the General Assembly, meeting in special session, approved a measure to permit enactment of a mid-decade redistricting congressional map effective for the 2026 mid-term election. A second passage was required in the 2026 session before the map could go to a voter referendum, which was completed on January 16. Republicans in Virginia…

Case Updateslawindepth, mid-decade redistricting, Virginia