The 2016 Northern Mariana Islands Democratic caucus took place on March 12 in the U.S. territory of the Northern Mariana Islands as one of the Democratic Party's primaries ahead of the 2016 presidential election. While on the same day, the Democratic Party didn't hold any other primary, the Republican Party held caucuses in Washington, D.C. and the territory of Guam the same day. The Republican Party's own Northern Mariana Islands caucus was to be held on March 15, 2016.