As of March 10, 2014, here are the percentages of Pennsylvania voters registered in each party: Democratic 49.72%, Republican 36.85%, Libertarian .55%, others and independent 12.87%. Efforts are underway to learn how many voters are registered in the Green and Constitution Parties.

In November 2012, the percentages were: Democratic 49.78%, Republican 37.11%, Libertarian .47%, Green .16%, Constitution .05%, other and independent 12.43%.

The March 10, 2014 totals are: Democratic 4,089,866; Republican 3,030,658; Libertarian 45,340; other and independent 1,059,378.

The Libertarian Party now exceeds one-half of 1% of the state total. It is the first Pennsylvania party, other than the two major parties, to have registration above one-half of 1% since 1934, when the Socialist Party last had registration that high. Past issues of the Pennsylvania Manual contain voter registration data. Back in 1934, the Socialist Party was electing a few state legislators in Pennsylvania, from Berks County.