The following table indicates the party of elected officials in the United States insular area of the Northern Mariana Islands:
The table also indicates the historical party composition in the:
The parties are as follows: (C), (D), (I), (R)/(T), (Ref), Vacant (V), and .
| Year | Executive offices | Commonwealth Legislature | U.S. House | ||||||
|---|---|---|---|---|---|---|---|---|---|
| class=unsortable | Governor! | class=unsortable | Lieutenant Governor! | class=unsortable | Attorney General! | class=unsortable | Senate! | class=unsortable | House |
| 1978 | Carlos Camacho (D) | Francisco Ada (D) | appointed | 5T, 4D | 8T, 6D | Edward Pangelinan (D) | |||
| 1979 | |||||||||
| 1980 | T majority | D majority | |||||||
| 1981 | |||||||||
| 1982 | Pedro Tenorio (R) | Pedro Agulto Tenorio (R) | R majority | R majority | |||||
| 1983 | Edward Pangelinan (R) | ||||||||
| 1984 | R majority | D majority | Froilan Tenorio (D) | ||||||
| 1985 | |||||||||
| 1986 | R majority | ||||||||
| 1987 | |||||||||
| 1988 | R majority | D majority | |||||||
| 1989 | |||||||||
| 1990 | Lorenzo I. De Leon Guerrero (R) | Benjamin Manglona (R) | D majority | R majority | Juan Babauta (R) | ||||
| 1991 | |||||||||
| 1992 | R majority | 10R, 6D, 2I[1] | |||||||
| 1993 | |||||||||
| 1994 | Froilan Tenorio (D) | Jesus Borja (D) | R majority | R majority | |||||
| 1995 | |||||||||
| 1996 | R majority | R majority | |||||||
| 1997 | |||||||||
| 1998 | Pedro Tenorio (R) | Jesus Sablan (R) | 8R, 1D | 13R, 5D | |||||
| 1999 | |||||||||
| 2000 | 6R, 2D, 1Ref | 11R, 6D, 1I | |||||||
| 2001 | |||||||||
| 2002 | Juan Babauta (R) | Diego Benavente (R) | 5R, 3D, 1C | 16R, 1D, 1C | Pedro Agulto Tenorio (R) | ||||
| 2003 | |||||||||
| 2004 | 3C, 2D, 2R, 2I | 9C, 7R, 1D, 1I | |||||||
| 2005 | |||||||||
| 2006 | Benigno Fitial (C) | Timothy Villagomez (C) | 3C, 3R, 2D, 1I | 7C, 7R, 2D, 2I | |||||
| 2007 | |||||||||
| 2008 | 12R, 4C, 3I, 1D | ||||||||
| 2009 | Eloy Inos (C) | Gregorio Sablan (I) | |||||||
| 2010 | 5R, 4I | 9R, 7C, 4I | |||||||
| 2011 | Benigno Fitial (R) | ||||||||
| 2012 | |||||||||
| 2013 | Eloy Inos (C) | Jude Hofschneider (R) | 5R, 4I | 12I, 4R, 4C | |||||
| 2014 | Eloy Inos (R) | 5R, 3I, 1V | |||||||
| 2015 | Ralph Torres (R) | Edward Manibusan (D) | 7R, 2I | 13I, 7R | |||||
| 2016 | Ralph Torres (R) | Victor Hocog (R) | 6R, 3I | ||||||
| 2017 | 7R, 2I | 15R, 5I | |||||||
| 2018 | |||||||||
| 2019 | Arnold Palacios (R) | 6R, 3I | 13R, 7I | ||||||
| 2020 | |||||||||
| 2021 | 5R, 3I, 1D | 9R, 8D, 2ID, 1IR | |||||||
| 2022 | Arnold Palacios (I) | ||||||||
| 2023 | Arnold Palacios (I) | David M. Apatang (I) | 4R, 3I, 2D | 13I, 4D, 3R | Gregorio Sablan (D) | ||||
| 2024 | |||||||||