Interactive Data Exploration
U.S. Congressional Districts
A Data-Driven Portrait
The United States House of Representatives consists of 435 voting members, each representing a congressional district. These districts are the foundation of American representative democracy, yet they vary dramatically in population, demographics, and characteristics.
This interactive map reveals the stories within each district. Explore demographics, income, education, and more across all 435 voting districts plus 6 non-voting territories.
📊 Understanding This Map
Current View: Population Per District
The map colors show how many people each representative serves. In theory, all districts should have equal populations (the principle of "one person, one vote"). In practice, they vary significantly—from under 500,000 to over 3 million.
Why This Matters
Population disparities mean some Americans have more representation in Congress than others. A representative serving 500,000 people has more time per constituent than one serving 900,000. Learn about apportionment →
Coming Soon: Toggle between population, racial diversity, median income, education levels, voting patterns, and more indicators to explore different dimensions of representation.
Territories Not Visible: Puerto Rico, Virgin Islands, and Guam have non-voting delegates in Congress. These territories aren't shown on this continental U.S. projection but are included in the data. Puerto Rico's 3.3 million residents have just one non-voting representative—a stark example of representation inequality.
📚 Learn More & Data Sources
Educational Resources
Data Attribution
This visualization is part of an ongoing project to make congressional data more accessible.