Interpreting Canadian Census entries

[Leon47]

I have obtained a number of images of Canadian Census records via Ancestry.

In some, in the column called "Country or Place of Birth" I see entries like US, England, Ireland etc. These ones all have a corresponding year in the adjacent "Year of Immigration to Canada" field.

However I also see lots of large "O" marks, without a year in the adjacent field. Do these mean "Canada" - indicting that the person was a Canadian National by birth?

Why "O"?

Edit: See section attached (I now see that later Censuses don't have "O" entries).

Thanks.

[polarbear]

I believe the “O” would mean born in Ontario. Thus a Canadian by birth. You sometimes see just a “Q” for born in Quebec in some census records.

PB

[Leon47]

OK, that makes sense. Later censuses have actual place names in that field.

Thanks.