Under 3 in 10 registered Republican and Democratic voters in Pennsylvania cast a vote in the state’s 2024 presidential primary, according to unofficial data compiled by PoliticsPA.

Compiling available data from county election websites and/or the PA Department of State, 28 percent of eligible registered members of those parties turned out on Tuesday.

Topping the list were five smaller counties in the Commonwealth – Clarion (37.83%), Forest (37.58%), Sullivan (36.11%), Cameron (36.02%) and Wyoming (34.55%).

Of those counties with more than 100,000 registered GOP or Democratic voters, six topped the 30 percent mark – Cumberland, Bucks, Allegheny, Butler, Westmoreland and Dauphin. Each of those counties had a well-publicized contested primary for voters to consider, including congressional races in PA-01, PA-10, PA-12 and PA-14, while Butler had a contested state House primary.

Janelle Stelson outdistanced five other challengers for the Democratic nomination for Congress in PA-10 in Cumberland and Dauphin; Rep. Summer Lee (D-12) defeated Bhavini Patel to earn the Democratic nomination in PA-12 in Allegheny County, while Westmoreland’s PA-14 finds Chris Dziados in the lead over Ken Bach.

The Commonwealth’s largest county – Philadelphia – had a turnout of just 20.51% of Republicans and Democrats.

CORRECTION: A previous posting showed a bar chart that showed turnout that included all registered voters in the county. This chart reflects only those Republicans and Democrats eligible to vote in the primary.