Tonga
0 cu m (1 January 2007 est.)
Trinidad and Tobago
531.5 billion cu m (1 January 2008 est.)
Tunisia
65.13 billion cu m (1 January 2008 est.)
Turkey
8.495 billion cu m (1 January 2008 est.)
Turkmenistan
2.832 trillion cu m (1 January 2008 est.)
Turks and Caicos Islands
0 cu m (1 January 2006 est.)
Uganda
0 cu m (1 January 2006 est.)
Ukraine
1.104 trillion cu m (1 January 2008 est.)
United Arab Emirates
6.071 trillion cu m (1 January 2008 est.)
United Kingdom
412 billion cu m (1 January 2008 est.)