Public Domain Feature Films

Here is a list of feature length films in the Public Domain in the United States of America. (Other countries have different copyright laws.) There is also a book from the 1970s called "50,000 motion pictures in the public domain" which was created by checking films that had been registered for copyright but the copyright was never renewed - something that was required in the USA before 1976.

Public Domain films in the USA include:

Numbers, A-B-C

The 39 Steps (1935)
Abilene Town (1946)
Abraham Lincoln (1930)
Ace Drummond (1936)
The Adventures of Smilin' Jack (1943)
Aerial Gunner (1943)
Africa Screams (1949)
Algiers (1938)
The Amazing Mr. X (1948)
Assignment Outer Space
The Amazing Transparent Man (1960)
And Then There Were None (1945)
Angel And The Badman (1946)
Angel On My Shoulder (1946)
Angels Hard As They Come (1971)
The Ape (1940)
The Ape Man (1943)
Assassin Of Youth (1937)
At War With The Army (1950)
Atom Age Vampire (1963)
Attack of the Giant Leeches (1959)
Attack from Space
The Bat (1959)
The Battleship Potemkin
Bear Shooters (1930)
Beat The Devil (1953)
Bela Lugosi Meets A Brooklyn Gorilla (1952)
The Bigamist (1953)
Beneath the 12 Mile Reef (1953)
The Big Show (1936)
The Birth Of A Nation (1915)
Black Dragons (1942)
The Blood Of Jesus (1941)
Bloody Pit of Horror (1965)
Bluebeard (1944)
Bowery at Midnight (1942)
Boy Meets Dog (1938)
The Boy in the Plastic Bubble (1976)
The Brain That Wouldn't Die (1962)
Bride of the Gorilla (1951)
Brideless Groom (1947)
Broken Blossoms (1919)
A Bucket of Blood (1959)
Bulldog Drummound (1929)
Burn 'Em Up Barnes (1934)
Bad Man of Deadwood (1941)
The Beachcomber - aka - Vessel of Warth (1938)
The Beachcomber (1939)
Becky Sharp (1935)
Behave Yourself (1951)
Beloved Rogue, The (1927) - The United Artists feature film is PD, the R-C comedy short is not.
Betsy Ross (1917)
Black Pirate, The (1926)
Black Raven, The (1943)
Blue Steel (1934) PD
Born to the West - Hell Town (1937)
The Cabinet of Dr. Caligari (1920) (watch/download at archive.org))
Captain Kidd (1945)
Carnival of Souls (1962)
Cause For Alarm! (1951)
Cavalcade of the West (1936)
Chained For Life (1951)
Charade (1963)
Check And Double Check (1930)
The Chicken Of Tomorrow' (1948)
Child Bride (1938)
The City of the Dead (1960)
The Corpse Vanishes (1942)
Corregidor (1943)
Crash of the Moons (1954)
Creature from the Haunted Sea (1961)
Cyrano de Bergerac (1950)

D-E-F

DOA 1950
Daniel Boone (1936) PD
Daniel Boone, Trail Blazer (1956) PD
Day the Sky Exploded, The
Detour (1945) PD
Devil's Messenger, The (1961) PD
Dead Men Walk 1943
Death Rides A Horse 1967
Dementia 13 1963
Detour 1945
Dick Tracy 1937 serial
Disorder in the Court: Three Stooges serial 1936
Dogs of War 1923 Our Gang short
Doomed to Die 1940
Dressed to Kill 1946
The Driller Killer 1979
Duck and Cover 1952
Eegah (1962) PD
Eagle, The (1925)
Embryo 1976
The Eternal Jew 1940
Eternally Yours 1939
Experiments in the Revival of Organisms 1940
A Farewell to Arms 1932
The Fast and the Furious (1955)
The Fatal Hour (1940)
Father's Little Divident 1951
Faust 1926
Fear in the Night 1947
Fight for the Sky, The (1945) PD, U.S. Government
Fighting Caravans (1931) PD
Fire Over England (1937)
Flash Gordon Conquers the Universe 1941
The Flying Devices 1939
Foolish Wives 1922
Freaks 1932
The Front Page 1931
Frozen North, The (1922) PD

G-H-I

Gangster's Den, The (1945) PD
Gangster Story (1960)
The General (1927) -- Starring Buster Keaton.
The Giant Gila Monster 1959
Glamour Gal 1945
Glorifying the American Girl (1929)
Go Down, Death! 1944
The Gold Rush 1925
The Gorilla 1939
The Great Alaskan Mystery 1944
The Great Rupert 1950
Greed 1924
Gulliver's Travels (the 1939 Max Fleischer animated version)
Gumbasia 1953
Happy Go Lovely 1951
Haxan 1922
He Walked By Night 1948
Hell's House 1932
Hemp for Victory 1942
Hercules 1958
Hercules Unchained 1959
Hercules and the Tyrants of Babylon 1964
Hercules vs. The Moon Men 1964
His Girl Friday (1940)
Hittin' the Trail (1937) PD
Hoodlum, The (1951) PD
The Hitch-Hiker 1953
Holy Ghost People 1967
Horror Express 1972
Horrors of Spider Island 1960
House on Haunted Hill 1959
The Hunchback of Notre Dame 1923
The Hurricane Express 1932
I Cover the Waterfront 1933
Impact 1949
The Incredible Petrified World 1957
The Incredible 2-Headed Transplant 1971
Indestructible Man 1956
The Inspector General 1949
Invisible Ghost 1941
Intolerence 1916

J-K-L

Jap Zero (1943), U.S. Government
The Jungle Book 1942 (watch/download at archive.org)
King Kong
La Ciociara - Two Women (1960)
Lady Gangster (1942) PD
Last of the Mohicans (1920 silent)
Let There Be Light (1946) PD, U.S. Government
Light of Western Stars, The (1940) PD
Jack and the Beanstalk 1952
The Jackie Robinson Story 1950
Jail Bait 1954
Jesses James Meets Frankenstein's Daughter 1966
The Killer Shrews 1959
King of the Zombies 1941
Kansas City Confidential 1952 (watch/download at archive.org)
Lady Frankenstein 1971
The Lady Vanishes 1938
The Last Man on Earth 1964
The Last Time I Saw Paris 1954
Last Woman on Earth 1960
Little Miss Marker 1935 (watch/download at archive.org)
Little Lord Fauntleroy 1936
The Little Princess 1939
The Little Shop of Horrors 1960
The Lost City 1935
The Lost Jungle 1934
The Lost World 1925

M-N-O

M 1931
Ma Barker's Killer Brood (1960) PD
The Mad Monster 1942
Malice in the Palace 1949
Man with a Movie Camera 1929
Manfish 1956
Maniac 1934
Manos the Hands of Fate (1966)
The Manster 1959
Marihuana 1936
McLintock! 1963
Meet John Doe 1941
Metropolis 1927
Midnight Manhunt 1945
My Dear Secretary 1949
The Monster Maker 1944
The Monster Walks 1932
Mr. Adam's Bomb (1949)
Mr. Boggs Steps Out 1938
Mr. Robinson Cruesoe 1932
Murder at the Baskervilles
Mutiny (1952) PD
My Favorite Brunette
Neath Brooklyn Bridge
The New Adventures of Tarzan 1935
Night of the Living Dead
Nightmare Castle 1965
North Star, The (1943)
Nosferatu 1922
Nothing Sacred 1937
One Body Too Many 1944
Orphans of the Storm (1921)
Our Gang (1922)
Our Gang Follies of 1938 (1937)
The Outlaw (1943)

P-Q-R

Paper Bullets - Gangs Inc. (1941) PD
Phantom from Space
Pimpernel Smith (1941)
Quicksand (1950) PD
Rainbow Valley (1935) PD
Red House, The (1947)
Reign of Terror (1949)
Return of The Street Fighter (1974/5)

S-T-U

Santa Fe Trail (1940) PD
Satanic Rites of Dracula, The (1974) - United Kingdom should be okay.^{[please verify]}
Sherlock Holmes and the Woman in Green (1945) PD
Sign of Four, The (1932)
Sin of Harold Diddlebock, The (1947) PD
Sita Sings the Blues (2008) CC0
Sister Streetfighter (1974/6)
Snows of Kilimanjaro,The (1952) PD
The Street Fighter (1974/5)
The Street Fighter's Last Revenge (1974/9)
A Study in Scarlet (1933)
Swing Parade of 1946 (1946)
Target for Today (1944) PD, U.S. Government
Teenage Zombies (1959) - United States should be okay^{[please verify]}
The Thief of Bagdad (1924) - there are at least five versions of this film, only the first of which is in the public domain. The spelling 'Bagdad' is used for all five.
Too Late for Tears (1949) PD
Unknown World (1951)

V-W-X

Whistle Stop (1946) PD
Whom the Gods Destroy (1916)

Young and Innocent (aka Girl Was Young, The (USA) (1937) PD