I try to list every certificate I can find for every railroad in North America.

I define "North America" as all land north of the coast of Colombia. I include all railroad companies that operated in the Caribbean islands

Catalog numbers are assigned to certificates based on company name, I maintain a list of every railroad and railroad-related company I have ever found reference to. Here is a breakdown of the number of companies I have found in each country.

Certificates from railroad companies based outside continental North America are normally beyond the scope of this catalog. However, if a foreign company laid track anywhere in North America or the Caribbean islands, I try to include it.

I do NOT include companies which incorporated in North America, but operated (or intended to operate) in countries outside of North America.

Please contact me if you specialize in non-U.S. countries and know of present or historical rail companies there. I particularly need help with southern Mexico and Central America.