No, Hillary Clinton has never served as Vice President of the United States.
While she has had a prominent political career, including serving as the Senator from New York and as Secretary of State under President Barack Obama, she has not held the position of Vice President. Clinton was the Democratic nominee for President in 2016, but she did not win the election.
The role of Vice President has been held by other political figures, most recently Kamala Harris, who took office in January 2021. Clinton’s political journey has been significant, but the Vice Presidency has not been a part of it.