Here are my favorite films from France (including co-productions).

Rated 10/10
Napoléon (Gance, 1927)
The Passion of Joan of Arc (Dreyer, 1928)
Un Chien Andalou (Buñuel & Dali, 1929)
L’Age d’Or (Buñuel, 1930)
Zéro de conduite (Vigo, 1933)
L’Atalante (Vigo, 1934)
Grand Illusion (Renoir, 1937)
The Rules of the Game (Renoir, 1939)
Children of Paradise (Carné, 1945)
Beauty and the Beast (Cocteau, 1946)
Diary of a Country Priest (Bresson, 1951)
Forbidden Games (Clément, 1952)
The Earrings of Madame de… (Ophüls, 1953)
Mr. Hulot’s Holiday (Tati, 1953)
Night and Fog (Resnais, 1955)
A Man Escaped (Bresson, 1956)
Hiroshima, Mon Amour (Resnais, 1959)
The 400 Blows (Truffaut, 1959)
Breathless (Godard, 1960)
Jules and Jim (Truffaut, 1962)
Le Jetée (Marker, 1962)
Vivre sa vie (My Life to Live) (Godard, 1962)
The Trial (Welles, 1962) (France/Italy/Germany)
Band of Outsiders (Godard, 1964)
Belle de jour (Buñuel, 1966)
Play Time (Tati, 1967)
The Discreet Charm of the Bourgeoisie (Buñuel, 1972)
Last Tango in Paris (Bertolucci, 1972) (France/Italy)
Atlantic City (Malle, 1980) (France/Canada)
Microcosmos (Nuridsany & Pérennou, 2000)
Fat Girl (Breillat, 2001)

Rated 9/10
The Blood of a Poet (Cocteau, 1930)
La Chienne (Renoir, 1931)
La Ronde (Ophüls, 1950)
Les Diaboliques (Clouzot, 1955)
Lola Montès (Ophüls, 1955) (France/West Germany)
Mon Oncle (Tati, 1958)
Shoot the Piano Player (Truffaut, 1961)
A Woman Is a Woman (Godard, 1961)
Contempt (Godard, 1963)
Pierre le fou (Godard, 1965)
King of Hearts (de Broca, 1966) (France/West Germany)
Le boucher (The Butcher) (Chabrol, 1970)
The Wild Child (Truffaut, 1971)
That Obscure Object of Desire (Buñuel, 1977)
Sans Soleil (Marker, 1983)
Hotel Terminus: The Life and Times of Klaus Barbie (Ophüls, 1988)
Amélie (Jeunet, 2001)
The Piano Teacher (Haneke, 2001) (Austria/France/Germany)
March of the Penguins (Jacquet, 2005)
Caché (Hidden) (Haneke, 2005) (France/Austria/Germany/Italy)
Of Gods and Men (Beauvois, 2010)
Carlos (Assayas, 2010) (France/Germany)
The Kid with a Bike (Dardennes, 2011) (Belgium/France/Italy)
Amour (Haneke, 2012) (Austria/France/Germany)
Goodbye to Language (Godard, 2014)
Two Days, One Night (Dardennes, 2014) (Belgium/France/Italy)
Clouds of Sils Maria (Assayas, 2014) (France/Germany/Switzerland)