On July 29, 2025, the Pennsylvania Department of State reported that there were 3,805,436 (42.9%) registered Democrats, 3,631,663 (40.9%) registered Republicans, 1,105,016 (12.5%) registered unaffiliated and 319,807 (3.6%) registered with other parties.
The following table indicates the party of elected officials in the U.S. state of Pennsylvania:
The table also indicates the historical party composition in the:
Following the 2020 Census, Pennsylvania lost one seat in the U.S. House of Representatives. As a result, starting with the general election of 2022, Pennsylvania sent 17 members to the house, and beginning with the general election of 2024 has 19 electoral votes.