161 states have signed the treaty

The Convention on the Prohibition of the Use, Stockpiling, Production and Transfer of Anti-Personnel Mines and on Their Destruction, typically referred to as the “Ottawa Convention” or “Mine Ban Treaty,” seeks to end the use of anti-personnel land mines worldwide.

As of February 2013, 161 states are party to the treaty. 

There are 36 non-signatories, including major powers such as the United States, Russia and China.  Few countries in key regions of tension, namely the Middle East and South Asia, have opted to participate.

Many non-signatories are in de facto compliance with the Ottawa Convention by refusing to use land mines and committing to voluntary destruction of stockpiles. Still, millions of mines are estimated to be planted in the ground in 59 countries. Global stockpiles are thought to total more than 100 million mines.

Arms Control Association