A Treaty Investor Visa (E-2) is designed to promote trade and investment between the US and other treaty countries to further good relations and peace. E-2 visas may only be applied for by people or companies from countries with whom the U.S. has entered into treaties with and with whom those treaties are in force. Below is a list of E-2 treaty countries:
| Albania | Argentina | Armenia | Austria |
| Australia | Azerbaijan | Bahrain | Bangladesh |
| Belgium | Bolivia | Bosnia-Herzegovina | Bulgaria |
| Cameroon | Canada | Chile | Colombia |
| Congo | Congo (DR) | Costa Rica | Croatia |
| Czech Republic | Ecuador | Egypt | Estonia |
| Ethiopia | Finland | France | Germany |
| Grenada | Georgia | Honduras | Iran |
| Ireland | Italy | Jamaica | Japan |
| Jordan | Kazakhstan | Kyrgyzstan | Latvia |
| Liberia | Lithuania | Luxembourg | Macedonia |
| Mexico | Moldova | Mongolia | Morocco |
| Netherlands | Norway | Oman | Pakistan |
| Paraguay | Panama | Philippines | Poland |
| Romania | Senegal | Singapore | Slovak Republic |
| Slovakia | Slovenia | South Korea | Spain |
| Sri Lanka | Suriname | Sweden | Switzerland |
| Taiwan | Thailand | Togo | Trinidad & Tobago |
| Tunisia | Turkey | Ukraine | United Kingdom |
