Theodore George Osius III (born 1961) is an American diplomat and the former United States Ambassador to Vietnam.

[7] In addition to English, Osius speaks Vietnamese, French and Italian, as well as a bit of Arabic, Hindi, Thai, Japanese, and Indonesian.

[7] In 1998 Osius returned to advise Vice President Al Gore on Asian affairs.

[6] Osius returned again to Washington in 2012 to work as a senior fellow at the Center for Strategic and International Studies.

[10] In 2004, Osius met his future husband, Clayton Bond, then a watch officer in the State Department's operations center, at a meeting of Gays and Lesbians in Foreign Affairs Agencies.