Unholy Alliance

Unholy Alliance may refer to:
 * Unholy alliance (geopolitical), when political antagonists temporarily join together to fight a common enemy
 * The Unholy Alliance (professional wrestling), an Extreme Championship Wrestling tag team
 * The Unholy Alliance Tour, an annual heavy metal tour
 * The Unholy Alliance (TV series), a 2017 Hong Kong television drama
 * "Unholy Alliance", Parts One and Two, episodes of Highlander: The Series

Literature

 * Unholy Alliance, a book by David Yallop
 * Unholy Alliance: A History of Nazi Involvement with the Occult, a book by Peter Levenda
 * Unholy Alliance: Radical Islam and the American Left, a book by David Horowitz
 * Unholy Alliance: Religion and Atrocity in Our Time, a book by Marc H. Ellis.
 * An Unholy Alliance, a novel by Susanna Gregory
 * Unholy Alliance, a supervillain team from the comic book series Astro City