The Ontario Postcard Collection comprises over four thousand images of Ontario places, with a particular emphasis on southwestern Ontario. Approximately 2000 postcards are of London, Ontario only. Also there are few hundred photographic postcards catalogued amongst the Postcard Collection.
The postcards depict the following aspects of urban and rural life: street scenes: aerial views, business districts, city squares; buildings : town halls, churches, residences, businesses; railways: trains, stations, bridges;harbour scenes: beaches, fishing, ships;sports and recreation: parks, team pictures, action shots, motoring; disasters: storms, fires, accidents; rural life: farm scenes, harvesting, market day; industrial scenes: factories, oil gushers, mining.