Wikipedia:2016 United States presidential primaries in Puerto Rico

Although Puerto Rico did not participate in the November 8, 2016, general election because it is a territory and not a state, the five non-incorporated territories that send delegates to the United States House of Representatives participated in the presidential primaries.

In the presidential primaries, Puerto Rico voters expressed their preferences for the Democratic and Republican parties' respective nominees for president. Registered members of each party only voted in their party's primary, while voters who were unaffiliated chose any one primary in which to vote. There were 60 Democratic delegates and 23 Republican delegates to be allocated.

Republican primary
The Republican primary took place on March 6, 2016: Twelve candidates appeared on the Republican presidential primary ballot, with only four still possessing active campaigns: Marco Rubio, Donald Trump, Ted Cruz, and John Kasich

Sen. Marco Rubio carried the primary with 73.8% of the vote and was awarded all 23 delegates due to the territory's 50% winner-take-all threshold.

Democratic caucus
The Democratic caucus took place on June 5, 2016.