Varieties currently produced in the US and Canada:  2019 US Acres  Canadian Acres  Past Years

Potato Association of America

PAA - Certification Agency Contact Info

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 

U.S. Seed Potato Certification Agencies

Alaska

California

Colorado

Idaho

Maine

Michigan

Minnesota

Montana

Nebraska

New York

North Dakota

Oregon

Utah

Washington

Wisconsin

Wyoming

USDA-APHIS Contacts

CFIA

Seed Potato Growers' Associations (or Growers' Directories/Commissions)
United States

Alaska

California

Colorado

Idaho

Maine

Michigan

Minnesota

Montana

Nebraska

New York

North Dakota

Oregon

Washington

Wisconsin

Wyoming

Canada

Alberta

Edmonton

New Brunswick

PEI

Saskatchewan