Tatiana S. Riegel, A.C.E., is an American film editor known for independent films such as Lars and the Real Girl, The Way Way Back, and I, Tonya. She received an ACE Eddie award for "Best Edited Miniseries or Motion Picture for Non-Commercial Television."

Riegel was a long-time assistant to the late editor Sally Menke, editor of seven films by Quentin Tarantino.

Riegel became a member of the Academy of Motion Picture Arts and Sciences in 2014 and was nominated for Best Film Editing in 2018 for I, Tonya.

Riegel is the older half-sibling to actress Eden Riegel and screenwriter/voice actor Sam Riegel. Together, the Riegel family has produced more than a dozen webisodes for the popular 2008 Internet series Imaginary Bitches.

Riegel is a lesbian; her half-sister Eden consulted her when portraying the lesbian character Bianca Montgomery on All My Children.

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