Saint Michael's Church is the only Roman catholic church in the city of Sihanoukville, Cambodia. Built in the 1960s, it is one of the rare churches in Cambodia that survived the systematic destruction of churches and pagodas during the Khmer Rouge regime.

Sihanoukville, also known as Kampong Saom, is a coastal city in Cambodia and the capital of Preah Sihanouk Province, at the tip of an elevated peninsula in the country's south-west on the Gulf of Thailand. The city has a string of beaches along its entire coastline and coastal marshlands bordering Ream National Park in the east. The city has one navigable river, the mangrove-lined Ou Trojak Jet, running from Otres Pagoda to the sea at Otres. A number of thinly inhabited islands, under Sihanoukville's administration, are near the city.