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: Covenant (C), Democratic (D), Independent (I), Republican (R), and a tie or coalition within a group of elected officials.
| Year | Executive offices | Commonwealth Legislature | U.S. House | ||
|---|---|---|---|---|---|
| Governor | Lieutenant Governor | Territorial Senate | Territorial House | ||
| 1978 | Carlos Camacho (D) | Francisco Ada (D) | Edward Pangelinan (D) | ||
| 1979 | |||||
| 1980 | |||||
| 1981 | |||||
| 1982 | Pedro Tenorio (R) | Pedro Agulto Tenorio (R) | |||
| 1983 | |||||
| 1984 | Froilan Tenorio (D) | ||||
| 1985 | |||||
| 1986 | |||||
| 1987 | |||||
| 1988 | |||||
| 1989 | |||||
| 1990 | Lorenzo I. De Leon Guerrero (R) | Benjamin Manglona (R) | Juan Babauta (R) | ||
| 1991 | |||||
| 1992 | |||||
| 1993 | |||||
| 1994 | Froilan Tenorio (D) | Jesus Borja (D) | |||
| 1995 | |||||
| 1996 | |||||
| 1997 | |||||
| 1998 | Pedro Tenorio (R) | Jesus Sablan (R) | |||
| 1999 | |||||
| 2000 | |||||
| 2001 | |||||
| 2002 | Juan Babauta (R) | Diego Benavente (R) | Pedro Agulto Tenorio (R) | ||
| 2003 | |||||
| 2004 | |||||
| 2005 | |||||
| 2006 | Benigno R. Fitial (C) | Timothy P. Villagomez (C)[1] | 6Coalition, 3R (3C, 3R, 2D, 1I) |
7C, 7R, 2D, 2I | |
| 2007 | |||||
| 2008 | 12R, 4C, 3I, 1D | ||||
| 2009 | Eloy S. Inos (C)[2] | Gregorio Sablan (I) | |||
| 2010 | unknown | 9R, 7C, 4I | Gregorio Sablan (D) | ||
| 2011 | Benigno R. Fitial (R)[3] | ||||
| Year | Governor | Lieutenant Governor | Territorial Senate | Territorial House | U.S. House |
| Executive offices | Commonwealth Legislature | ||||