California voters approved Gov. Gavin Newsom’s Prop. 50 in November 2025, which temporarily gerrymanders the state’s congressional districts in favor of Democrats. The move was in response to the Texas legislature redrawing their districts to favor Republicans outside the typical redistricting cycle. Based on some forecasts, Democrats could flip as many as five congressional seats with the new maps.

Congressional districts are historically redrawn every ten years by state legislatures following a census. California voters moved that responsibility from the state legislature to a nonpartisan, independent redistricting commission in 2010; six other states also use these kinds of commissions. Prop. 50 allowed the legislature to draw partisan districts until the independent commission redraws maps following the 2030 census. 

Did the boundaries of your congressional district change? Does the new district have more Republicans than the previous one? More Democrats? Enter your address into our lookup tool and see exactly how the borders and partisan make-up of your district will change for next year’s election.

Jeremia is a data journalist who uses code and data to make policy and politicians easier to understand. He was previously a graphics editor at the COVID Tracking Project and a data journalist at NBC News...