| Election Name: | 1959 Hawaii Senate election |
| Country: | Hawaii |
| Type: | legislative |
| Ongoing: | no |
| Next Election: | 1962 Hawaii Senate election |
| Next Year: | 1962 |
| Seats For Election: | All 25 seats in the Hawaii Senate |
| Majority Seats: | 13 |
| Election Date: | July 28, 1959 |
| Turnout: | 93.6% |
| Party1: | Hawaii Republican Party |
| Leader1: | William Hardy Hill |
| Leaders Seat1: | 1–Hilo |
| Seats1: | 14 |
| Popular Vote1: | 337,976 |
| Percentage1: | 50.00% |
| Party2: | Democratic Party of Hawaii |
| Leader2: | — |
| Leaders Seat2: | — |
| Seats2: | 11 |
| Popular Vote2: | 335,993 |
| Percentage2: | 49.71% |
| Map Size: | 320px |
| Hawaii Senate President | |
| Before Election: | Office established |
| After Election: | William Hardy Hill |
| After Party: | Hawaii Republican Party |
The 1959 Hawaii Senate election was held on July 28, 1959, in Hawaii's last days as a territory to elect members of the first Hawaii State Legislature. All 25 seats of the Senate were up for election, with 14 seats being won by Republicans and 11 by Democrats.
Longtime territorial legislator William H. Hill from Hilo was elected President of the Senate, the first Senate president during statehood.[1]
Source: 6 August 1959 . OFFICIAL TABULATION • RESULT OF VOTES CAST GENERAL ELECTION TUESDAY, JULY 28, 1959 . Honolulu, HI . State of Hawaii Office of Elections . 3-37. Obtained from the State of Hawaii Office of Elections on 15 April 2024.
Senate District 1, located on the eastern half of Hawaii, was entitled to five state senators.[2]
Senate District 2, located on the western half of Hawaii, was entitled to two state senators.[2]
Senate District 3, located on the islands of Kahoolawe, Maui, Molokai, and Lanai, was entitled to five state senators.[2]
Senate District 4, located in Honolulu on Oahu, was entitled to five state senators.[2]
Senate District 5, located on most of Oahu surrounding Honolulu, was entitled to five state senators.[2]
Senate District 6, located on the islands of Kauai and Niihau, was entitled to three state senators.[2]