Ô Môn is an urban district (quận) located in Cần Thơ, situated within the Mekong Delta region of Vietnam. It serves as one of the constituent administrative divisions of the city.
The district covers a total area of 126 km2. According to census data, the population of Ô Môn was recorded at 128,075 in 2004 and grew to 164,234 by 2018.