Election-atlas.ca is an online atlas of federal and provincial election results in Canada. At the federal level the maps go back as far as the 1925 general election; provincial election maps go back as far as the late 1960s or early 1970s. Poll-by-poll results are available for the most recent elections.

This is a huge resource, all the more impressive given the scope of the data and the fact that it seems to have been done by just one person: J. P. Kirby, a self-described “regular guy interested in politics and elections. I’m also a map geek.” (Naturally.) What I like best is that the atlas shows the historical electoral district boundaries for each election, which is fascinating on its own but must have taken some digging on Kirby’s part. (Also kind of weird to see early 20th-century results overlaid on a modern, OSM-based map with airports and freeways and so on.)

Previously: 1895 Electoral Atlas of Canada.