Romania is the second largest market in Central and Eastern Europe, with a population of over 22 million, and a member of the European Union and NATO.  Many of the largest American corporations are already present in Romania, including 3M, AIG, Alcoa, Amway, Avon, Bunge, Cargill, Cisco, Citibank, Coca-Cola, Colgate Palmolive, Ernest & Young, Delphi, General Electric, HBO, Honeywell Garret, Howard Johnson's, HP, IBM, Johnson Controls, Kodak, Kraft, Lockheed Martin, McDonald's, Microsoft, Motorola, New Century Holdings, Oracle, Philip Morris, Proctor and Gamble, Qualcomm, RAEF, Solectron, Timken, UPS, Visa, Washington Group, Xerox, and many more.  Many large Ohio corporations do business in Romania or have established manufacturing facilities there. 

Resources for U.S. investors:

Romanian Agency for Foreign Investments:

American Chamber of Commerce in Romania:

Romania: Country Commercial Guide (2008 edition): download