The U.S. Department of State maintains the official list of E-2 Treaty Investor countries. Currently, eligible nations include:  

Europe:
Albania, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Kosovo, Latvia, Lithuania, Luxembourg, Moldova, Montenegro, North Macedonia, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovak Republic, Slovenia, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom.

 North America:
 Central America & Caribbean: Canada, Mexico, Costa Rica, Honduras, Jamaica, Panama, Trinidad & Tobago, Grenada  South America: Argentina, Bolivia, Chile, Colombia, Ecuador, Paraguay, Suriname.

  Asia-Pacific:
 Australia, Bangladesh, Japan, Kazakhstan, Kyrgyzstan, Mongolia, New Zealand, Pakistan, Philippines, Singapore, South Korea, Sri Lanka, Taiwan, Thailand.

  Middle East:
Bahrain, Israel, Jordan, Oman.

  Africa: 
Cameroon, Congo (Brazzaville), Congo (Kinshasa), Egypt, Ethiopia, Liberia, Morocco, Senegal, Togo, Tunisia.

  Caucasus Region: 
Armenia, Azerbaijan, Georgia.