| # | Image | Member | Term of office | Legislature | Party | Electoral history | Constituent LGUs |
|---|
| Start | End |
|---|
|
| District created January 9, 1907.[5][6] |
| 1 | |  | Baldomero Pobre | October 16, 1907 | October 16, 1909 | 1st | Nacionalista | Elected in 1907. | 1907–1909 Badoc,Batac,Dingras,Paoay |
| 2 | |  | Lucas Paredes | October 16, 1909 | October 16, 1912 | 2nd | Nacionalista | Elected in 1909. | 1909–1916 Badoc,Batac,Dingras,Paoay,San Nicolas,Solsona |
| 3 | |  | Teogenes Quiaoit | October 16, 1912 | October 16, 1916 | 3rd | Progresista | Elected in 1912. |
Ilocos Norte's 2nd district for the House of Representatives of the Philippine Islands[edit] |
| 4 | |  | Melchor Flor | October 16, 1916 | June 3, 1919 | 4th | Progresista | Elected in 1916. | 1916–1919 Badoc,Banna,Batac,Dingras,Paoay,San Nicolas,Solsona |
| 5 | |  | Faustino Adiarte | June 3, 1919 | June 6, 1922 | 5th | Nacionalista | Elected in 1919. | 1919–1922 Badoc,Banna,Batac,Dingras,Nueva Era,Paoay,Pinili,San Nicolas,Solsona |
| 6 | |  | Román Campos | June 6, 1922 | June 2, 1925 | 6th | Nacionalista Colectivista | Elected in 1922. | 1922–1935 Badoc,Banna,Batac,Currimao,Dingras,Nueva Era,Paoay,Pinili,San Nicolas,Solsona |
| 7 | |  | Mariano Marcos | June 2, 1925 | June 2, 1931 | 7th | Nacionalista Consolidado | Elected in 1925. |
| 8th | Re-elected in 1928. |
| 8 | | | Emilio L. Medina | June 2, 1931 | June 5, 1934 | 9th | Nacionalista Consolidado | Elected in 1931. |
| 9 | |  | Julio Nalundasan | June 5, 1934 | September 20, 1935 | 10th | Nacionalista Democrático | Elected in 1934. Died. |
| # | Image | Member | Term of office | National Assembly | Party | Electoral history | Constituent LGUs |
|---|
| Start | End |
|---|
|
| (9) | |  | Julio Nalundasan | – | – | 1st | Nacionalista Democrático | Re-elected in 1935. Died before start of term. | 1935–1941 Badoc,Banna,Batac,Currimao,Dingras,Nueva Era,Paoay,Pinili,San Nicolas,Solsona |
| 10 | |  | Ulpiano Arzadon | September 1, 1936[citation needed] | December 30, 1941 | Nacionalista Democrático | Elected in 1936 to finish Nalundasan's term. |
| 2nd | Nacionalista | Re-elected in 1938. |
| District dissolved into the two-seatIlocos Norte's at-large district for theNational Assembly (Second Philippine Republic). |
| # | Image | Member | Term of office | Common wealth Congress | Party | Electoral history | Constituent LGUs |
|---|
| Start | End |
|---|
Ilocos Norte's 2nd district for the House of Representatives of the Commonwealth of the Philippines[edit] |
| District re-created May 24, 1945. |
| 11 | | | Conrado Rubio | June 11, 1945 | May 25, 1946 | 1st | Nacionalista | Elected in 1941. | 1945–1946 Badoc,Banna,Batac,Currimao,Dingras,Nueva Era,Paoay,Pinili,San Nicolas,Solsona |
| # | Image | Member | Term of office | Congress | Party | Electoral history | Constituent LGUs |
|---|
| Start | End |
|---|
|
| 12 | | | Pedro G. Albano | May 25, 1946 | December 30, 1949 | 1st | Liberal | Elected in 1946. | 1946–1965 Badoc,Banna,Batac,Currimao,Dingras,Nueva Era,Paoay,Pinili,San Nicolas,Solsona |
| 13 | |  | Ferdinand Marcos | December 30, 1949 | December 30, 1959 | 2nd | Liberal | Elected in 1949. |
| 3rd | Re-elected in 1953. |
| 4th | Re-elected in 1957. Resigned onelection as senator. |
| 14 | |  | Simeon M. Valdéz | December 30, 1961 | September 23, 1972 | 5th | Nacionalista | Elected in 1961. |
| 6th | Re-elected in 1965. | 1965–1972 Badoc,Batac,Currimao,Dingras,Espiritu,Marcos,Nueva Era,Paoay,Pinili,San Nicolas,Solsona |
| 7th | Re-elected in 1969. Removed from office afterimposition of martial law. |
| District dissolved into the twelve-seat Region I's at-large district for the Interim Batasang Pambansa, followed by the two-seatIlocos Norte's at-large district for the Regular Batasang Pambansa. |
| District re-created February 2, 1987. |
| 15 | |  | Mariano R. Nalupta Jr. | June 30, 1987 | June 30, 1992 | 8th | KBL | Elected in 1987. | 1987–1998 Badoc,Batac,Currimao,Dingras,Espiritu,Marcos,Nueva Era,Paoay,Pinili,San Nicolas,Solsona |
| 16 | |  | Bongbong Marcos | June 30, 1992 | June 30, 1995 | 9th | KBL | Elected in 1992. |
| (14) | |  | Simeon M. Valdez | June 30, 1995 | June 30, 1998 | 10th | Lakas | Elected in 1995. |
| 17 | |  | Imee Marcos | June 30, 1998 | June 30, 2007 | 11th | KBL | Elected in 1998. | 1998–present Badoc,Banna,Batac,Currimao,Dingras,Marcos,Nueva Era,Paoay,Pinili,San Nicolas,Solsona |
| 12th | Re-elected in 2001. |
| 13th | Re-elected in 2004. |
| (16) | |  | Bongbong Marcos | June 30, 2007 | June 30, 2010 | 14th | KBL | Elected in 2007. |
| Nacionalista |
| 18 | |  | Imelda Marcos | June 30, 2010 | June 30, 2019 | 15th | KBL (Nacionalista) | Elected in 2010. |
| 16th | Re-elected in 2013. |
| 17th | Nacionalista | Re-elected in 2016. |
| 19 | |  | Eugenio Angelo M. Barba | June 30, 2019 | Incumbent | 18th | Nacionalista | Elected in 2019. |
| 19th | Re-elected in 2022. |
| 20th | Re-elected in 2025. |