Ninón Sevilla in Victims of Sin (1951).

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Ninón Sevilla in Victims of Sin (1951).
In Mexico, film noir evolved in foreign models while still drawing on and transforming local aesthetic traditions. While taking up some of the same modern problems and dynamics as Hollwood noir, the films refashion the emotional appeal of melodrama to engage with Mexican modernity and midcentury national culture.
Salón México (1949) and Aventurera (1949) are supreme examples of the cabaretera genre, which is considered by some as the Mexican equivalent of film noir; so many of the cabaretera films have noir-like overtones both in content and style.
La mujer del puerto (1933) is seen as proto-noir, but if we counted it, it would mean Mexican noir anticipated Hollywood by a decade.
Distinto Amamencer may well be the first film noir; its release in 1943 places it a full year ahead of the traditional noir kickoff year of 1944.
Other films considered noir:
Misterios del hampa (1944), Juan Orol
La otra (1946), Roberto Gavaldón
A la sombra del puente (1948), Roberto Gavaldón
El reino de los gángsters (1948), Juan Orol
Gángsters contra charros (1948), Juan Orol
Ángeles del arrabal (1949), Raúl de Anda
Eterna Agonía (1949), Julián Soler
Ventarrón (1949), Chano Urueta
Cuatro contra el mundo (1950), Alejandro Galindo
Los Olvidados (1950), Luis Buñuel
Crimen y castigo (1951), Fernando de Fuentes
El suavecito (1951), Fernando Méndez
En la palma de tu mano (1951), Roberto Gavaldón
Manos de seda (1951), Chano Urueta
Sensualidad (1951), Alberto Gout
Susana (1951), Luis Buñuel
Víctimas del pecado (1951), Emilio Fernández
La noche avanza (1952), Roberto Gavaldón
Él (1953), Luis Buñuel
Ensayo de un crimen (1955), Luis Buñuel
Pedro Vargas - Aventurera
From the very entertaining cabaretera (Mexican film noir/musical) Aventurera (1950)