The official APS membership is 49,653 as of January 2013.
Historical Membership Counts, 1899-2013
Membership Counts by Category
APS Membership Stands at 49,653 (APS News - February 2013)
If you have any questions regarding the statistics, please email APS Membership (firstname.lastname@example.org).
NOTE: Graphs are on different scales reflecting different totals from the January 2013 count.