Oscar for beste filmatisering

Oscar for beste filmatisering eller best tilrettelagte/adapterte manus (engelsk: Academy Award for Writing Adapted Screenplay) gis hvert år ved Oscar-utdelingen til en manusforfatter som har skrevet det beste filmmanuskript basert på et tidligere publisert materiale (som oftest en roman, et skuespill eller en novelle). 

Vinnere
Årstallene angir tidspunktet for filmens premiere (i California, USA) og dermed året før selve Oscar-utdelingen.
2010-tallet
2016 Moonlight – Barry Jenkins og Tarell Alvin McCraney
2015 The Big Short – Adam McKay og Charles Randolph
2014 The Imitation Game – Graham Moore2013 12 Years a Slave – John Ridley
2012 Operasjon Argo – Chris Terrio2011 The Descendants – Alexander Payne, Nat Faxon og Jim Rash
2010 The Social Network – Aaron Sorkin

2000-tallet
2009 Precious – Geoffrey S. Fletcher
2008 Slumdog Millionaire – Han som hadde svar på alt – Simon Beaufoy
2007 No Country for Old Men – Joel og Ethan Coen
2006 The Departed – William Monahan
2005 Brokeback Mountain – Larry McMurtry, Diana Ossana
2004 Sideways – Alexander Payne, Jim Taylor
2003 Ringenes Herre: Atter en konge – Peter Jackson, Philippa Boyens, Fran Walsh
2002 Pianisten (The Pianist) – Ronald Harwood
2001 Et vakkert sinn (A Beautiful Mind) – Akiva Goldsman
2000 Traffic – Steohen Gaghan

1990-tallet
1999 Siderhusreglene (The Cider House Rules) – John Irving
1998 Gods and Monsters – Bill Condon
1997 L.A. Confidential – Brian Helgeland, Curtis Hanson
1996 Sling Blade – Billy Bob Thornton
1995 Fornuft og følelser (Sense and Sensibility) – Emma Thompson
1994 Forrest Gump – Eric Roth 
1993 Schindlers liste (Schindler's List) – Steven Zaillian
1992 Howards End – Ruth Prawer Jhabvala
1991 Nattsvermeren (The Silence of the Lambs) – Ted Tally
1990 Danser med ulver (Dances with Wolves) – Michael Blake

1980-tallet
1989 På tur med Miss Daisy (Driving Miss Daisy) – Alfred Uhry
1988 Farlige forbindelser (Dangerous Liaisons) – Christpher Hampton
1987 Den siste keiseren (The Last Emperor) – Bernardo Bertolucci, Mark Peploe
1986 Et rom med utsikt (A Room with a View) – Ruth Prawer Jhabvala
1985 Mit Afrika (Out of Afriva) – Kurt Luedtke
1984 Amadeus – Peter Shaffer
1983 Tid for ømhet (Terms of Endearment) – James L. Brooks 
1982 Savnet (Missing) – Costa-Gavras, Donald Stewart
1981 Sensommer (On Golden Pond) – Ernest Thompson
1980 Ordinary People – Alvin Sargent

1970-tallet
1979 Kramer mot Kramer (Kramer vs. Kramer) – Robert Benton
1978 Midnight Express – Oliver Stone
1977 Julia – Alvin Sargent
1976 Alle presidentens menn (All the President's Men) – William Goldman
1975 Gjøkeredet (One Flew over the Cuckoo's Nest) – Lawrence Hauben, Bo Goldman
1974 Gudfaren 2 (The Godfather: Part II) – Francis Ford Coppola, Mario Puzo
1973 Exorcisten (The Exorcist) – William Peter Blatty
1972 Gudfaren (The Godfather) – Francis Ford Coppola, Mario Puzo
1971 Brennpunkt New York (The French Connection) – Ernest Tidyman 
1970 MASH – Ring Lardner

1960-tallet
1969 Midnight Cowboy – Waldo Salt
1968 Løven om vinteren (The Lion in Winter) – James Goldman
1967 Natten var het (In the Heat of the Night) – Stirling Silliphant
1966 En mann fremfor alt (A Man for All Seasons) – Robert Bolt
1965 Doctor Zhivago– Robert Bolt
1964 Becket – Edward Anhalt
1963 Tom Jones – John Osborn
1962 Drep ikke en sangfugl (To Kill a Mockingbird) – Horton Foote 
1961 Dommen i Nürnberg – Abby Mann
1960 Elmer Gantry – Richard Brooks

1950-tallet
1959 Plass på toppen (Room at the Top) – Neil Paterson 
1958 Gigi – Alan Jay Lerner
1957 Broen over Kwai (The Bridge on the River Kwai)– Michael Wilson, Carl Foreman, Pierre Boulle
1956 Jorden rundt på 80 dager (Around the World in 80 Days) – James Poe, John Farrow, S.J. Perelman
1955 Marty – Paddy Chayefsky
1954 Bak kulissene (The Country Girl) – George Seaton
1953 Herfra til evigheten (From Here to Eternity) – Daniel Taradash 
1952 Blendende løgn (The Bad and the Beautiful) – Charles Schnee
1951 En plass i solen  (A Place in the Sun) – Michael Wilson, Harry Brown
1950 Alt om Eva (All About Eve) – Joseph L. Mankiewicz 

1940-tallet
1949 Min mann eller din? (A Letter to Three Wives) – Joseph L. Mankiewicz
1948 Sierra Madres skatt (The Treasure of the Sierra Madre) – John Huston
1947 Miraklet på Manhattan (Miracle on 34th Street) – George Seaton
1946 De beste år av vårt liv – Robert E. Sherwood 
1945 Forspilte dager (The Lost Weekend)– Charles Brackett, Billy Wilder
1944 Going My Way – Frank Butler, Frank Cavett
1943 Casablanca – Julius J. Epstein, Philip G. Epstein, Howard Koch
1942 Mrs. Miniver – Arthur Wimperis, George Froeschel, James Hilton, Claudine West
1941 Here Comes Mr. Jordan – Sidney Buchman, Seton I. Miller
1940 En nydelig historie (The Philadelphia Story) – Donald Ogden Stewart

1930-tallet
1939 Tatt av vinden (Gone with the Wind) – Sidney Howard
1938 Pygmalion – George Bernard Shaw, W.P. Lipscomb, Cecil Lewis, Ian Dalrymple
1937 Emile Zolas liv – Norma Reilly Raine, Heinz Herald, Geza Herczeg
1936 The Story of Louis Pasteur – Pierre Collings, Sheridan Gibney
1935 Angiveren – Dudley Nichols
1934 Det hendte en natt (It Happened One Night) – Robert Riskin 
1933 Unge kvinner (Little Women) – Victor Heerman, Sarah Y. Mason 
1932 Barn av idag (Bad Girl) – Edwin Burke
1931 Cimarron – Howard Estabrook
1930 Mennesker i bur (The Big House) – Frances Marion

1920-tallet
1929 The Patriot – Hans Kraly
1928 Syvende himmel (Seventh Heaven) – Benjamin Glazer

Filmatisering