The Popular Democratic Party is a political party in Puerto Rico that advocates to continue as a Commonwealth of the United States with self-governance. The party was founded in 1938 by dissidents from the Puerto Rican Liberal Party and the Unionist Party and originally promoted policies on the center-left. In recent years, however, its leaders have described the party as centrist.

The Liberal Party of Puerto Rico was a pro-Puerto Rican independence political party. The Liberal Party was founded in 1932 as a formal disaffiliation between two political parties which composed the political coalition known as the Alianza (Alliance).