Ziva David (Hebrew: זיוה דוִד, pronounced "da-veed") is a fictional character in the TV series, NCIS, played by Cote de Pablo. The character was introduced to the series in the third season premiere. de Pablo became a regular cast member from episode "Silver War" onwards.

Ziva is a Mossad agent sent to NCIS following the murder of Special Agent Caitlin Todd by a rogue Mossad operative named Ari Haswari. She was Ari's control officer and half-sister; they share the same father, who is the Deputy-Director of Mossad. During Kill Ari (Part 2), NCIS Special Agent Gibbs is cornered by Ari, but then Ziva emerges and kills Ari. After Ari's death, she asked to be assigned as a liaison for Mossad at NCIS, where she subsequently joined Special Agent Leroy Jethro Gibbs' team.

When her younger sister, Tali, was killed in a Hamas suicide bombing, Ziva was already a Mossad operative at the time and states that she was in the Israeli army for an unspecified time (It is assumed that this time was at least two years as that is the minimum compulsory service all Israeli women undertake), whilst claiming that no-one recruited her, she volunteered for Mossad. "Kill Ari (Part 2)", NCIS, Season 3 Episode 2.