| # | Image | Member | Term of office | Legislature | Party | Electoral history | Constituent LGUs |
|---|
| Start | End |
|---|
|
| District created January 9, 1907. [5] [6] |
| 1 | | | Leopoldo Rovira | October 16, 1907 | October 16, 1909 | 1st | Progresista | Elected in 1907. | 1907–1909 Ayuquitan Nuevo, Bais, Dumaguete, Guihulngan, Tanjay, Tayasan |
| 2 | | | Hermenegildo Villanueva | October 16, 1909 | October 16, 1916 | 2nd | Progresista | Elected in 1909. | 1909–1912 Ayuquitan Nuevo, Bais, Dumaguete, Guihulngan, Manjuyod, Tanjay, Tayasan |
| 3rd | Re-elected in 1912. | 1912–1916 Ayuquitan Nuevo, Bais, Dumaguete, Guihulngan, Jimalalud, Manjuyod, Sibulan, Tanjay, Tayasan |
Negros Oriental's 1st district for the House of Representatives of the Philippine Islands |
| 3 | | | Restituto Villegas | October 16, 1916 | June 6, 1922 | 4th | Progresista | Elected in 1916. | 1916–1919 Ayuquitan Nuevo, Bais, Dumaguete, Guihulngan, Jimalalud, Manjuyod, Sibulan, Tanjay, Tayasan, Vallehermoso |
| 5th | Re-elected in 1919. | 1919–1935 Ayuquitan Nuevo, Bais, Dumaguete, Guihulngan, Jimalalud, La Libertad, Manjuyod, Sibulan, Tanjay, Tayasan, Vallehermoso |
| 4 | | | Guillermo Z. Villanueva | June 6, 1922 | September 16, 1935 | 6th | Nacionalista Colectivista | Elected in 1922. |
| 7th | Nacionalista Consolidado | Re-elected in 1925. |
| 8th | Re-elected in 1928. |
| 9th | Re-elected in 1931. |
| 10th | Nacionalista Democrático | Re-elected in 1934. |
| # | Image | Member | Term of office | National Assembly | Party | Electoral history | Constituent LGUs |
|---|
| Start | End |
|---|
|
| (4) | | | Guillermo Z. Villanueva | September 16, 1935 | December 30, 1941 | 1st | Nacionalista Democrático | Re-elected in 1935. | 1935–1941 Ayuquitan Nuevo, Bais, Dumaguete, Guihulngan, Jimalalud, La Libertad, Manjuyod, Sibulan, Tanjay, Tayasan, Vallehermoso |
| 2nd | Nacionalista | Re-elected in 1938. |
| District dissolved into the two-seat Negros Oriental's at-large district for the National Assembly (Second Philippine Republic). |
| # | Image | Member | Term of office | Common wealth Congress | Party | Electoral history | Constituent LGUs |
|---|
| Start | End |
|---|
Negros Oriental's 1st district for the House of Representatives of the Commonwealth of the Philippines |
| District re-created May 24, 1945. |
| 5 | | | Julián L. Teves | June 11, 1945 | May 25, 1946 | 1st | Nacionalista | Elected in 1941. | 1945–1946 Ayuquitan Nuevo, Bais, Dumaguete, Guihulngan, Jimalalud, La Libertad, Manjuyod, Sibulan, Tanjay, Tayasan, Vallehermoso |
| # | Image | Member | Term of office | Congress | Party | Electoral history | Constituent LGUs |
|---|
| Start | End |
|---|
|
| 6 | | | Lorenzo Teves | May 25, 1946 | December 30, 1949 | 1st | Nacionalista | Elected in 1946. | 1946–1949 Ayuquitan Nuevo, Bais, Dumaguete, Guihulngan, Jimalalud, La Libertad, Manjuyod, Sibulan, Tanjay, Tayasan, Vallehermoso |
| 7 | | | Pedro A. Bandoquillo | December 30, 1949 | November 13, 1951 | 2nd | Liberal | Elected in 1949. Resigned on election as Negros Oriental governor. | 1949–1953 Ayuquitan Nuevo, Bais, Canlaon, Dumaguete, Guihulngan, Jimalalud, La Libertad, Manjuyod, Payabon, Sibulan, Tanjay, Tayasan, Vallehermoso |
| (6) | | | Lorenzo Teves | December 30, 1953 | November 14, 1967 | 3rd | Nacionalista | Elected in 1953. | 1953–1957 Amlan, Bais, Canlaon, Dumaguete, Guihulngan, Jimalalud, La Libertad, Manjuyod, Payabon, Sibulan, Tanjay, Tayasan, Vallehermoso |
| 4th | Re-elected in 1957. | 1957–1961 Amlan, Bais, Canlaon, Dumaguete, Guihulngan, Jimalalud, La Libertad, Manjuyod, Payabon, San Jose, Sibulan, Tanjay, Tayasan, Vallehermoso |
| 5th | Elected in 1961. | 1961–1972 Amlan, Bais, Bindoy, Canlaon, Dumaguete, Guihulngan, Jimalalud, La Libertad, Mabinay Manjuyod, Pamplona, San Jose, Sibulan, Tanjay, Tayasan, Vallehermoso |
| 6th | Re-elected in 1965. Resigned on election as senator. |
| 8 | | | Herminio Teves | December 30, 1969 | September 23, 1972 | 7th | Liberal | Elected in 1969. Removed from office after imposition of martial law. |
| District dissolved into the thirteen-seat Region VII's at-large district for the Interim Batasang Pambansa, followed by the three-seat Negros Oriental's at-large district for the Regular Batasang Pambansa. |
| District re-created February 2, 1987. |
| 9 | | | Jerome V. Paras | June 30, 1987 | June 30, 1998 | 8th | Lakas ng Bansa | Elected in 1987. | 1987–present Ayungon, Bindoy, Canlaon, Guihulngan, Jimalalud, La Libertad, Manjuyod, Tayasan, Vallehermoso |
| 9th | Lakas | Re-elected in 1992. |
| 10th | Re-elected in 1995. |
| 10 | | | Jacinto Paras | June 30, 1998 | June 30, 2007 | 11th | LAMMP | Elected in 1998. |
| 12th | LDP | Re-elected in 2001. |
| 13th | Re-elected in 2004. |
| 11 | | | Jocelyn Sy-Limkaichong | June 30, 2007 | June 30, 2013 | 14th | Liberal | Elected in 2007. |
| 15th | Re-elected in 2010. |
| 12 | | | Manuel M. Iway | June 30, 2013 | June 30, 2016 | 16th | Liberal | Elected in 2013. |
| (11) | | | Jocelyn Sy-Limkaichong | June 30, 2016 | June 30, 2025 | 17th | Liberal | Elected in 2016. |
| 18th | Re-elected in 2019. |
| 19th | Re-elected in 2022. |
| (12) | | | Emmanuel L. Iway | June 30, 2025 | Incumbent | 20th | PFP | Elected in 2025. |