Varieties currently produced in the US and Canada: 
2020 US Acres (by ac)  2020 US Acres (by Variety)  Canadian Acres  Past Years
Potato Association of America

PAA - Certification Agency Contact List   

PAA - Certification Agency Contact Information

PAA - General Agency Survey

PAA - Summary of Rules and Regulations (U.S. & Canada)

PAA - Summary of Post Harvest Test Requirements (by state)

PAA - North American Seed Health Certificate (blank) PDF / Excel

PAA - Limited Generation Table (modified)

WISCPC - Blackleg Tolerance - for US and Canada 

National Links

UNECE Potato Resources

Potatoes USA Resources