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Just over one-quarter (26%) of the adult population aged 25 to 64 in Ontario had a university degree, the highest proportion among all provinces and territories. This is partly a reflection of the large number of immigrants who settled in Ontario.
In contrast, only 9% of its adult population had a trades certificate as their highest level of educational attainment, which was the lowest proportion in Canada.
About 22% of Ontario's adult population had a college diploma, while about 25% had a high school diploma, and 14% had not completed high school.
Moreover, while Ontario accounted for over 43% of the estimated 3,985,800 adults aged 25 to 64 in Canada who had a university degree, three in 10 Ontario adults with a university degree obtained it outside of Canada.
Only 20% of Ontario rural residents had not completed high school, the second lowest proportion of all provinces. Ontario's rural residents also had the highest rate of college graduates of all the provinces, at 24%.