North America (including Central America and island-states of the Caribbean Sea) Building Image Location Country First built Denomination Notes Al-Sadiq Mosque Chicago, Illinois United States 1922 Mother Mosque of America (Moslem Temple) Ross, North Dakota United States 1934 Built in Iowa in 1934,[citation needed] became the oldest standing mosque in America when the Ross Mosque was torn down in the 1970s. The Ross Mosque was later rebuilt in 2005. Al-Rashid Mosque Edmonton, Alberta Canada 1938 First purpose built mosque.