Trinidad and Tobago
990 million bbl (1 January 2004)
Tunisia
1.7 billion bbl (2005 est.)
Turkey
288.4 million bbl (1 January 2002)
Turkmenistan
273 million bbl (1 January 2002)
Ukraine
395 million bbl (9 November 2004)
United Arab Emirates
97.8 billion bbl (2005 est.)
United Kingdom
4.5 billion bbl (31 December 2004)
United States
22.45 billion bbl (1 January 2002)
Uzbekistan
600 million bbl (1 January 2005)
Venezuela
75.59 billion bbl (2005 est.)