http://www.thebulletin.org/article_nn.php?art_ofn=ja06norris

Bulletin's global total can be found at the above link.
Their current total is 26,854
 

Excessive secrecy prohibits the public from knowing the exact number
of nuclear weapons in the world. Each nation shields the details of
its own nuclear arsenal and generally knows few precise details about
the size and composition of other countries' stockpiles.

Despite the uncertainty, we know that the total global nuclear weapons
stockpile is considerably smaller than the 1986 Cold War high of
70,000-plus warheads. Through a series of arms control agreements and
unilateral decisions, nuclear weapon states have reduced the global
stockpile to its lowest level in 45 years. In the same period, the
number of nuclear weapon states has grown from three to nine.

We estimate that these nine states possess about 27,000 intact nuclear
warheads, of which 97 percent are in U.S. and Russian stockpiles.
About 12,500 of these warheads are considered operational, with the
balance in reserve or retired and awaiting dismantlement. We are able
to make our estimates by monitoring all known nuclear weapon
developments, by studying long-term trends, and by tracking the
implementation of arms control treaties...
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