1st
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
| 1 |  Vicente Singson Encarnacion |
Progresista | October 16, 1916 – June 6, 1922 |
Elected in 1916. Retired. |
1 | 4th | 1 | Elected in 1916. Retired. |
October 16, 1916 – June 3, 1919 |
Nacionalista |  Juan Villamor | |
| 5th | ||||||||||||
| 2 |  Isabelo de los Reyes |
Nacionalista Colectivista | June 6, 1922 – June 2, 1925 |
Elected in 1922. Retired. |
2 | 6th | ||||||
| Nacionalista Consolidado | June 2, 1925 – June 5, 1928 |
7th | ||||||||||
| 2 |  Melecio Arranz |
Nacionalista Consolidado | June 5, 1928 – June 5, 1934 |
Elected in 1928. Re-elected in 1934. Retired. |
3 | 8th | ||||||
| 9th | ||||||||||||
| Nacionalista Democratico | June 5, 1934 – September 16, 1935 |
10th | ||||||||||
2nd
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
3rd
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
4th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
5th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
6th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
7th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
8th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
9th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
10th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
11th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
12th
edit| Class A | C | Class B | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
| 1 |  Hadji Butu |
Nacionalista | October 16, 1916 – November 15, 1920 |
Appointed to term. Resigned. |
1 | 4th | ||||||
| 5th | ||||||||||||
| 2 | Teofisto Guingona Sr. |
Progresista | November 15, 1920 – June 6, 1922 |
Appointed to term. | ||||||||