U.S. Embassy in Athens

91 Vasilisis Sophias Avenue
10160 Athens, Greece
Phone: +30-210-721-2951

https://gr.usembassy.gov/embassy-consulate/athens/

The U.S. Embassy in Athens was established in 1961 and is a major U.S. diplomatic mission in Greece. The Embassy provides various services, including consular assistance to U.S. citizens, visa services to Greek nationals and other foreign nationals wishing to travel to the United States, and assistance with trade and economic matters. 

U.S. Consulate in Thessaloniki

43 Tsimiski, 7th Floor
546 23 Thessaloniki GREECE
Telephone: +30 2310 242 905