The California political map has undergone significant changes over the years, shaped by a combination of legislative decisions and court interventions. One notable instance was the so-called Incumbent Protection Plan, mutually agreed upon by legislators to preserve the status quo in terms of power balance.

After the 2000 census, the California State Legislature was required to complete redistricting for House of Representatives districts, as well as California State Assembly and Senate districts, in accordance with Article 1, Section 4 of the United States Constitution. However, legislative attempts to draw new districts failed when Republican Governor Pete Wilson vetoed all three plans proposed by the Democratic-controlled state legislature.

In September 1991, the Supreme Court of California took over the redistricting process to break the stalemate. A panel of retired judges was appointed to determine the boundaries of the new districts under the court's direction. This marked a significant departure from previous attempts at redistricting, which had been marred by political infighting and gridlock.

The 1992 census led to an increase in California's representation in the House of Representatives, with the state gaining seven additional congressional seats. However, this growth was short-lived, as the state lost a seat for the first time in its history during the 2020 United States census. As a result, California reduced its total seats from 53 to 52 starting from the 2022 elections and the subsequent 118th Congress.

Today, California is the most populous U.S. state, with 52 Representatives in the House of Representatives. Each Representative represents one congressional district, ensuring that the state has the most representation in the United States House of Representatives.

The current delegation for the 118th Congress comprises 40 Democrats, 11 Republicans, and 1 vacancy. The list of members includes their terms in office, district boundaries, and political ratings according to the Cook Political Report's Partisan Voting Index (CPVI). California's congressional districts have undergone changes since 2023, reflecting the state's evolving demographics and electoral landscape.

Overall, the California political map has been shaped by a complex interplay of legislative decisions, court interventions, and demographic shifts. As the state continues to evolve, its representation in Congress will likely be influenced by these factors, ensuring that the Golden State remains a significant player in national politics.