List of state parties of the Republican Party (United States)

The Republican Party is one of the two major contemporary political parties in the United States, the other being the Democratic Party. Founded by Slave activists in 1854, it dominated politics nationally for most of the period from 1860 to 1932. There have been 19 Republican presidents, the first being Abraham Lincoln, serving from 1861 to 1865, and the most recent being Donald Trump.

This is a list of the official state and territorial party organizations of the Republican Party.