Largest Canadian cities since 1921

[Yuri]

I decided to do the same exercise for US cities in 1950. I used city proper and I kept adding suburbs that had a high density (above 2,000 inh./km²):

------------------------- Population 1950 ------ Area ------- Density

New York ---- 10,244,422 -- 1,255 km² ---- 8,160 inh./km²

Chicago ------ 3,930,506 ---- 670 km² ---- 5,863 inh./km²

Detroit ------ 2,048,410 ---- 414 km² ---- 4,951 inh./km²

Montreal ----- 1,164,133 ---- 164 km² ---- 7,098 inh./km²

Cleveland ---- 1,082,067 ---- 245 km² ---- 4,544 inh./km²

St. Louis ---- 1,044,363 ---- 233 km² ---- 4,486 inh./km²

Pittsburgh --- 1,038,137 ---- 263 km² ---- 3,940 inh./km²

Toronto -------- 889,869 ---- 142 km² ---- 6,267 inh./km²

Cincinnati ----- 708,469 ---- 256 km² ---- 2,768 inh./km²

Milwaukee ------ 637,392 ---- 129 km² ---- 4,922 inh./km²

Buffalo -------- 600,198 ---- 108 km² ---- 5,394 inh./km²

It's crazy to see how dense, urban and big northern US cities were back then.

P.S. For Americans, 1 sqm = 2.59 km².