Thick as Thieves may refer to:

• Thick as Thieves (1971 TV Film), starring (Corin Redgrave and Leonard Rossiter)
• Thick as Thieves (1998 film), a film directed by Scott Sanders
• Thick as Thieves (2009 film), a film directed by Mimi Leder and starring Morgan Freeman

• Gambit: Thick as Thieves, a 2022–2023 comic book limited series by Chris Claremont and Sid Kotian
• Thick as Thieves (Spiegelman novel), a 2011 novel by Peter Spiegelman
• Thick as Thieves (Turner novel), a 2017 novel by Megan Whalen Turner
• Thick as Thieves, a 1989 Hardy Boys Casefiles novel
• Thick as Thieves, a 1985 novel by Marie Ferrarella

• Thick as Thieves (Cavo album) or the title song (see below), 2012
• Thick as Thieves (The Temper Trap album) or the title song, 2016
• Thick as Thieves (Trooper album), 1978
• Thick as Thieves, by Kicked in the Head, 2000

• "Thick as Thieves" (Cavo song), 2011
• "Thick as Thieves", by Bon Jovi from What About Now, 2013
• "Thick as Thieves", by Dashboard Confessional from The Shade of Poison Trees, 2007
• "Thick as Thieves", by the Jam from Setting Sons, 1979
• "Thick as Thieves", by Kasabian from West Ryder Pauper Lunatic Asylum, 2009
• "Thick as Thieves", by Natalie Merchant from Ophelia, 1998
• "Thick as Thieves", by the Others from Inward Parts, 2006
• "Thick as Thieves", by Peter Wolf from Come as You Are, 1987
• "Thick as Thieves", by Shinedown from Threat to Survival, 2015
• "Thick as Thieves", by Short Stack from Shimmy a Go Go, 2008
• "Thick as Thieves", by the Summer Set from Everything's Fine, 2011

• Thick as Thieves (TV series), a 1974 British sitcom

• "Thick as Thieves" (Benson)
• "Thick as Thieves" (Cold Case)
• "Thick as Thieves" (Highlander: The Raven)
• "Thick as Thieves", an episode of All About Me
• "Thick as Thieves", an episode of Born and Bred

• "(You & Me) As Thick as Thieves", a song by Bang! Bang! Eche!