The Nigerian National Assembly delegation from Delta comprises three Senators representing Delta Central, Delta South, Delta North and ten Representatives representing Ethiope, Ughelli North/South/Udu, Ndokwa/Ukwani, Okpe/Sapele/Uvwie, Isoko North/South, Burutu, Warri, Ika, Aniocha North/South, and Bomadi/Patani.
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| OFFICE | NAME | PARTY | CONSTITUENCY | TERM |
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| Senator | APC | Delta Central | 2014 - till date | |
| Senator | James Manager | PDP | Delta South | 2003 - till date |
| Senator | Peter Onyeluka Nwaoboshi | APC | Delta North | 2015 - till date |
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| Ben Rollands Igbakpa | Ethiope | 2019 - till date | ||
| Francis E. Waive | Ughelli North/South/Udu | 2019 - till date | ||
| Ossai Ossai[1] | Ndokwa/Ukwani | 2011 - till date | ||
| Efe Afe[2] | Okpe/Sapele/Uvwie | 2019 - till date | ||
| Leo Ogor | Isoko North/South | 2003 - till date | ||
| Nicholas Mutu[3] | Burutu | 1999 - till date | ||
| Thomas Ereyitomi | Warri | 2019 - till date | ||
| Victor Nwokolo | Ika | 2011 - till date | ||
| Ndudi Elumelu[4] | PDP | Aniocha North/South | 2007 - till date | |
| Nicholas Ebomo Mutu | Bomadi/Patani | 1999 - till date | ||
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| OFFICE | NAME | PARTY | CONSTITUENCY | TERM |
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| Senator | Brume Fred Aghogho | PDP | Delta Central | 1999 - 2003 |
| Senator | Omu Stella | PDP | Delta South | 1999 - 2003 |
| Senator | Osakwe Patrick | PDP | Delta North | 1999 - 2007 |
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| Agoda John Halim Ochuko | Ethiope | 1999 - 2003 | ||
| Aguariavwodo Emmanuel Edesiri | Ughelli North/South/Udu | 1999 - 2003 | ||
| Almona-Isei Mercy | Ndokwa/Ukwani | 1999 - 2003 | ||
| Dumi Gabriel M. | Opke/Sapele/Uvwie | 1999 - 2003 | ||
| Efekodha Anthony Onomuefe | Isoko North/South | 1999 - 2003 | ||
| Emibra Agbeotu Efiriaendi | Burutu | 1999 - 2003 | ||
| Harriman Temi | Warri | 1999 - 2003 | ||
| Irabor Nduka | Ika | 1999 - 2003 | ||
| Nwoko Ned Munir | PDP | Aniocha North/South | 1999 - 2003 | |
| Nicholas Ebomo Mutu | Bomadi/Patani | 1999 - 2003 | ||