The 11th FINA World Swimming Championships (25m) was held in Istanbul, Turkey on 12–16 December 2012.

This swimming-only championships took place in the Sinan Erdem Dome; all events were swum in a 25-meter (short-course) pool.

Lochte and Hungarian Katinka Hosszú were named the best male and female swimmers of the competition.

In June 2013, Danish swimmer Mads Glæsner was stripped by FINA of a gold and bronze medal from the 400- and 1500-meter freestyle after testing positive for levomethamphetamine.

[3] In January 2014 the Court of Arbitration for Sport partially overturned FINA's ruling and returned the gold medal in 1500 m freestyle.