Cyril Ogston was the founder of the hamlet of Seven Persons, Alberta.

Ogston was a late-nineteenth-century Mormon who practised polygamy in line with his Church's teachings at the time. In 1862, the United States Congress made the practice illegal, and many Mormons fled to Canada in order to escape prosecution, and to set up Mormon communities there. Ogston was one of these, leaving Utah and founding Seven Persons.