Monday is the last day Pennsylvanians can register to vote in the May 20 primary election.
Voters can visit www.VotesPA.com to check their registration status, download a voter registration form, and find information on their polling place.
Anyone registering for the first time, changing their address, or changing their party affiliation must have their applications postmarked or delivered to their county board of elections by the close of business on Monday.
Voters in the primary will nominate candidates for governor and lieutenant governor, as well as representatives in Congress, state Senate and state House of Representatives.
Voters must be enrolled in a major political party to vote in that party's primary.