Duffy of San Quentin

{{Short description|1954 film by Walter Doniger}}

{{Infobox film

| name = Duffy of San Quentin

| image = Duffy of San Quentin poster.jpg

| alt =

| caption = Theatrical release poster

| director = Walter Doniger

| producer = Walter Doniger
Berman Swarttz

| writer = Walter Doniger
Berman Swarttz

| based_on = {{based on|The San Quentin Story|Clinton T. Duffy
Dean Jennings}}

| starring = Louis Hayward
Joanne Dru
Paul Kelly
Maureen O'Sullivan
George Macready
Horace McMahon

| music = Paul Dunlap

| cinematography = John Alton

| editing = Edward Sampson
Chester W. Schaeffer

| studio = Swarttz-Doniger Productions

| distributor = Warner Bros.

| released = {{Film date|1954|03|16}}

| runtime = 78 minutes

| country = United States

| language = English

| budget =

| gross =

}}

Duffy of San Quentin is a 1954 American film noir crime film directed by Walter Doniger and written by Walter Doniger and Berman Swarttz. The film stars Louis Hayward, Joanne Dru, Paul Kelly, Maureen O'Sullivan, George Macready and Horace McMahon. The film was released by Warner Bros. on March 16, 1954.{{cite web|url=https://www.tcm.com/tcmdb/title/73743/duffy-of-san-quentin |title=Duffy of San Quentin (1954) - Overview |publisher=Turner Classic Movies |date=1954-02-09 |access-date=2015-05-29}}{{cite web|last=Crowther |first=Bosley |url=https://www.nytimes.com/movie/review?res=9E06E2DB1638E23BBC4852DFB466838F649EDE |title=Movie Review - Duffy of San Quentin - THE SCREEN IN REVIEW |work=The New York Times |date=1954-02-10 |access-date=2015-05-29}}