The map geeks at the Toronto star have outdone themselves with this google map of Commuter cyclists by census tract (a small area as defined by Statistics Canada's census). It shows the breakdown of how people commute who live in that area. The census tracts with red boundaries are over 10%.
Politicians need to stop treating cyclists as if they are marginal. If you lived in an area with cycling at 13% and showed this data to your councillor maybe a lightbulb would go off in their head. It's still a minority but not one they can always safely ignore.
It doesn't address who commutes through the area. For instance, the area southwest of Dundas West and Dufferin has 11.5% of commutes by bicycle, yet there may be many people driving through from the suburbs which will water down that percentage on the road.
The highest percentage is on the Toronto Islands at 29%. This is unsurprising, since no cars are allowed. It's odd to think that 18% of them still drive to work - they must be parking cars downtown.
The second highest is in Parkdale at 14%! This area bounded by Dundas, Queen, Sorauren and Lansdowne has an above the Toronto average household income and is mostly detached houses with a few condos.
The core of the highest rates of bike commuting is in the Annex - bounded by Bloor, Dovercourt, Spadina and Dundas. Leslieville and East York aren't too far behind.