The North Dakota Republican Party is the North Dakota affiliate of the United States Republican Party.

It is currently the dominant party in the state, controlling North Dakota's at-large U.S. House seat, both U.S. Senate seats and the governorship, and it has supermajorities in both houses of the state legislature.

Founded in 1889, the Party initially dominated all state politics for the state's first 20 years of existence, with the exception of a brief period from 1893 to 1894 in which the North Dakota Democratic-Independent Party briefly overthrew the Republican Party.

In the early 20th century, the Party was effectively divided into two groups that nominated candidates on the Republican ticket, the progressive Non-Partisan League (NPL) and the conservative Independent Voters Association (IVA).

The Party holds its convention in the spring of election years, usually rotating the convention between four of the state's largest cities: Bismarck, Fargo, Grand Forks, and Minot.