Trinidad and Tobago
990 million bbl (1 January 2004)
Tunisia
417 million bbl (1 January 2002)
Turkey
288.4 million bbl (1 January 2002)
Turkmenistan
273 million bbl (1 January 2002)
Ukraine
197.5 million bbl (1 January 2002)
United Arab Emirates
80.31 billion bbl (1 January 2002)
United Kingdom
4.741 billion bbl (1 January 2002)
United States
22.45 billion bbl (1 January 2002)
Uzbekistan
297 million bbl (1 January 2002)
Venezuela
63.95 billion bbl (1 January 2002)