| Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. |
C |
Class 3Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 2010, 2014 (special election), 2016, and 2022. The next election will be in 2028. |
| # |
Senator |
Party |
Dates in office |
Electoral history |
T |
T |
Electoral history |
Dates in office |
Party |
Senator |
# |
| 1 |
 Hiram Fong (Honolulu) |
Republican |
Aug 21, 1959 – Jan 3, 1977 |
Elected in 1959. |
1 |
86th |
1 |
Elected in 1959.Retired. |
Aug 21, 1959 – Jan 3, 1963 |
Democratic |
 Oren E. Long (Honolulu) |
1 |
| 87th |
| 88th |
2 |
Elected in 1962. |
Jan 3, 1963 – Dec 17, 2012 |
Democratic |
 Daniel Inouye (Honolulu) |
2 |
| Re-elected in 1964. |
2 |
89th |
| 90th |
| 91st |
3 |
Re-elected in 1968. |
| Re-elected in 1970.Retired. |
3 |
92nd |
| 93rd |
| 94th |
4 |
Re-elected in 1974. |
| 2 |
 Spark Matsunaga (Honolulu) |
Democratic |
Jan 3, 1977 – Apr 15, 1990 |
Elected in 1976. |
4 |
95th |
| 96th |
| 97th |
5 |
Re-elected in 1980. |
| Re-elected in 1982. |
5 |
98th |
| 99th |
| 100th |
6 |
Re-elected in 1986. |
| Re-elected in 1988.Died. |
6 |
101st |
| Vacant |
Apr 15, 1990 – May 16, 1990 |
|
| 3 |
 Daniel Akaka (Honolulu) |
Democratic |
May 16, 1990 – Jan 3, 2013 |
Appointed to continue Matsunaga's term.Elected in 1990 to finish Matsunaga's term. |
| 102nd |
| 103rd |
7 |
Re-elected in 1992. |
| Re-elected in 1994. |
7 |
104th |
| 105th |
| 106th |
8 |
Re-elected in 1998. |
| Re-elected in 2000. |
8 |
107th |
| 108th |
| 109th |
9 |
Re-elected in 2004. |
| Re-elected in 2006.Retired. |
9 |
110th |
| 111th |
| 112th |
10 |
Re-elected in 2010.Died. |
| |
Dec 17, 2012 – Dec 26, 2012 |
Vacant |
| Appointed to continue Inouye's term.Elected in 2014 to finish Inouye's term. |
Dec 26, 2012 – present |
Democratic |
 Brian Schatz (Honolulu) |
3 |
| 4 |
 Mazie Hirono (Honolulu) |
Democratic |
Jan 3, 2013 – present |
Elected in 2012. |
10 |
113th |
| 114th |
| 115th |
11 |
Re-elected in 2016. |
| Re-elected in 2018. |
11 |
116th |
| 117th |
| 118th |
12 |
Re-elected in 2022. |
| Re-elected in 2024. |
12 |
119th |
| 120th |
| 121st |
13 |
To be determined in the 2028 election. |
| To be determined in the 2030 election. |
13 |
122nd |
| # |
Senator |
Party |
Years in office |
Electoral history |
T |
C |
T |
Electoral history |
Years in office |
Party |
Senator |
# |
| Class 1 |
Class 3 |