The following table indicates the party of elected officials in Guam, an unincorporated territory of the United States:
The table also indicates the historical party composition in the:
For years in which a presidential election was held, the table indicates which party's nominees won the island's presidential straw poll.
| Year | Executive offices | Territorial Legislature | Delegate | Presidential straw poll | |||
|---|---|---|---|---|---|---|---|
| class=unsortable | Governor | class=unsortable | Lieutenant Governor | class=unsortable | Attorney General | class=unsortable | Auditor |
| 1951 | Carlton Skinner (D) | no such office | appointed | appointed | Popular Party majority | no such office | no such contest |
| 1952 | |||||||
| 1953 | Ford Quint Elvidge (R) | ||||||
| 1954 | |||||||
| 1955 | |||||||
| 1956 | |||||||
| 1957 | Richard Barrett Lowe (R) | ||||||
| 1958 | |||||||
| 1959 | |||||||
| 1960 | Joseph Flores (R) | ||||||
| 1961 | Bill Daniel (D) | ||||||
| 1962 | |||||||
| 1963 | Manuel Flores Leon Guerrero (D) | ||||||
| 1964 | |||||||
| 1965 | Territorial Party majority | ||||||
| 1966 | |||||||
| 1967 | D majority | ||||||
| 1968 | |||||||
| 1969 | Carlos Camacho (R) | ||||||
| 1970 | |||||||
| 1971 | Kurt Moylan (R) | ||||||
| 1972 | |||||||
| 1973 | Antonio Borja Won Pat (D) | ||||||
| 1974 | |||||||
| 1975 | Ricardo Bordallo (D) | Rudy Sablan (D) | R majority | ||||
| 1976 | |||||||
| 1977 | |||||||
| 1978 | |||||||
| 1979 | Paul McDonald Calvo (R) | Joseph Franklin Ada (R) | |||||
| 1980 | Jimmy Carter/ Walter Mondale (D) | ||||||
| 1981 | |||||||
| 1982 | |||||||
| 1983 | Ricardo Bordallo (D) | Edward Diego Reyes (D) | D majority | ||||
| 1984 | Ronald Reagan/ George H. W. Bush (R) | ||||||
| 1985 | Vicente T. Blaz (R) | ||||||
| 1986 | |||||||
| 1987 | Joseph Franklin Ada (R) | Frank Blas (R) | |||||
| 1988 | George H. W. Bush/ Dan Quayle (R) | ||||||
| 1989 | |||||||
| 1990 | |||||||
| 1991 | |||||||
| 1992 | Bill Clinton/ Al Gore (D) | ||||||
| 1993 | Robert A. Underwood (D) | ||||||
| 1994 | |||||||
| 1995 | Carl Gutierrez (D) | Madeleine Bordallo (D) | |||||
| 1996 | |||||||
| 1997 | R majority | ||||||
| 1998 | |||||||
| 1999 | 10R, 5D | ||||||
| 2000 | Doris Flores Brooks (R) | George W. Bush/ Dick Cheney (R) | |||||
| 2001 | 8R, 7D | ||||||
| 2002 | |||||||
| 2003 | Felix Perez Camacho (R) | Kaleo Moylan (R) | Douglas Moylan (R) | 9D, 6R | Madeleine Bordallo (D) | ||
| 2004 | |||||||
| 2005 | 9R, 6D | ||||||
| 2006 | |||||||
| 2007 | Michael Cruz (R) | Alicia Limtiaco (D) | 8R, 7D | ||||
| 7R, 7D | |||||||
| 2008 | Barack Obama/ Joe Biden (D) | ||||||
| 8D, 7R | |||||||
| 2009 | 10D, 5R | ||||||
| 2010 | 9D, 6R | ||||||
| 2011 | Eddie Baza Calvo (R) | Ray Tenorio (R) | Leonardo Rapadas (R) | ||||
| 2012 | |||||||
| 2013 | |||||||
| 2014 | |||||||
| 2015 | Elizabeth Barrett-Anderson (R) | ||||||
| 2016 | Hillary Clinton/ Tim Kaine (D) | ||||||
| 2017 | |||||||
| 2018 | Benjamin Cruz (D) | ||||||
| 2019 | Lou Leon Guerrero (D) | Josh Tenorio (D) | Leevin Camacho (NP) | 10D, 5R | Michael San Nicolas (D) | ||
| 2020 | Joe Biden/ Kamala Harris (D) | ||||||
| 2021 | rowspan=2 | 8D, 7R | |||||
| 2022 | |||||||
| 2023 | Douglas Moylan (R) | 9D, 6R | James Moylan (R) | ||||
| 2024 | |||||||