The 2016 Constitution Party presidential primaries were 2 electoral contests, held in the states of Idaho and Missouri, by the Constitution Party during the 2016 election season in order to allocate delegates from those states to the 2016 Constitution Party National Convention.

The 2020 Constitution Party presidential primaries were a series of primary elections determining the allocation of delegates in the selection of the Constitution Party's presidential nominee in the 2020 United States presidential election. On May 2, 2020, the Constitution Party nominated Don Blankenship for president and William Mohr for vice-president. Several state parties split from the national Constitution Party to nominate their own candidates.