The Wayback Times and Canadian Stamp News are good resources for Canadian events that might have postcard vendors. For USA shows check the Postcard History Magazine calendar.
30th Annual Quebec Postcard Club Show
TBC June 2025 Montréal
Info from: Facebook: Club des cartophiles quebec
or Simon Beauregard Email
Quebec City Old Paper Show
May 24-25, 2025, opens 10am
3125 Blvd Hochelaga, Québec, QC G1W 2P9
Details here.
Eastern Ontario Postcard, Postal History & Ephemera Show
September 13th, 2025 10am-3pm
Wall Street United Church, 5 Wall St.
Brockville, ON (map) free admission & parking
Old Book and Paper Show
November 9th, 2025, 10am-4pm
Japanese Canadian Cultural Centre, 6 Sakura Way
Admission $12.00 cash. TTC accessible, free parking.
Info from: Antique Shows Canada
2026 Annual TPC Show
Sun. February 22nd, 2026, 10am-4pm
Japanese Canadian Cultural Centre
6 Sakura Way, Toronto, M3C 1Z5 (JCCC web-site)
Admission $10.00 cash. TPC members free.
Info from: Victor Caratun Email
International Show Calendars
USA Shows from Postcard History Magazine
U.K. Shows from Postcard Traders Association