As of 2021, there are a total of 79 E-2 treaty countries. These are countries with which the United States has signed a treaty of commerce and navigation that includes provisions for E-2 nonimmigrant investors.
Interestingly the top 3 EB-5 countries are not E-2 treaty countries.
E-2 Treaty Countries
Albania
Argentina
Armenia
Australia
Austria
Azerbaijan
Bahrain
Bangladesh
Belgium
Bosnia and Herzegovina
Bulgaria
Cameroon
Canada
Chile
China (Taiwan)
Colombia
Congo (Brazzaville)
Congo (Kinshasa)
Costa Rica
Croatia
Czech Republic
Denmark
Ecuador
Egypt
Estonia
Ethiopia
Finland
France
Georgia
Germany
Grenada
Honduras
Iran
Ireland
Israel
Italy
Jamaica
Japan
Jordan
Kazakhstan
South Korea
Kosovo
Kyrgyzstan
Latvia
Liberia
Lithuania
Luxembourg
Macedonia
Mexico
Moldova
Mongolia
Montenegro
Morocco
Netherlands
New Zealand
Norway
Oman
Pakistan
Panama
Paraguay
Philippines
Poland
Romania
Russia
Serbia
Senegal
Singapore
Slovak Republic
Slovenia
Spain
Sri Lanka
Suriname
Sweden
Switzerland
Thailand
Togo
Trinidad and Tobago
Tunisia
Turkey
Ukraine
United Kingdom
Uzbekistan
E-2 treaty countries can change over time