According to the official website, Mahou Shoujo Madoka★Magica Movie 1
will be shown in eighteen cities in eight countries: US, France, Italy, Republic of San Marino, South Korea, Taiwan, Hong Kong, and Singapore. Following the premiere in Japan on October 6th, the movie will be shown from October till December in these countries.
Key visual of Madoka Magica for the US release
Source: Madoka Magica official website