California Proposed Congressional Districts
November 2025 Special Election
Mapping Tool

THIS MAPPING TOOL PRESENTS POPULATION AND VOTER DATA FOR THE PROPOSED CALIFORNIA CONGRESSIONAL DISTRICTS IN THE NOVEMBER 5TH SPECIAL ELECTION. These proposed maps would replace the maps generated by the current California Citizens Redistricting Commission if Proposition 50 passes.

THIS TOOL IS A DEVELOPING PROJECT. ADDITIONAL DATA AND FUNCTIONALITY WILL BE ADDED AS AVAILABLE. CID WELCOME'S SUGGESTIONS AND FEEDBACK. THE TOOL IS MADE AVAILABLE TO HELP INFORM THE PUBLIC ABOUT THE PROPOSED CONGRESSIONAL DISTRICTS. CID IS A NONPARTISAN ACADEMIC RESEARCH CENTER.

Click on a Congressional District to see available data.

Note: Current methods in election science used to identify the race and ethnicity of voters in official voter files are less reliable for some demographic groups, including Indigenous/Native and Asian American subgroup populations. We identified registrants’ race and ethnicity in county voter files with the R package Who Are You (WRU), which computes the probability of each racial category for registrants using surname, neighborhood demographics (geocoding with census tract data), and other characteristics, such as gender, party and age. For this tool, analysis of the voter file by race and ethnicity is limited to Latino, Asian American, Black, and white, non-Latino registrants because imputation for other racial and ethnic groups can have a high degree of inaccuracy. However, some errors in measurement are present for these groups, particularly for Black and white, non-Latino registrants, and caution is appropriate when interpreting effects.

This project is supported by a grant from the Evelyn and Walter Haas, Jr. Fund.