It was initially released on the 26 August 2006 at BarCamp NYC by John Resig
The latest stable version (1.8.3) was released on 13 November 2012
It is used by over 55% of the 10,000 most visited websites
It is estimated that there are over 20 million websites running jQuery
19,909,315 websites that are using JQuery!
216,123 websites within the top million most visited sites use jQuery!
jQuery 19,909,315 websites vs MooTools 2,083,324 websites.
jQuery 19,909,315 websites vs Prototype 1,216,637 websites.
jQuery 19,909,315 websites vs script.aculo.us 1,008,167 websites.
It is used by 51% of the top 100,000 and 42% of the top million websites
jQuery is most likely to be found in use on Business, Shopping or Technology type websites.
The next most popular jQuery competitors (SWFObject & MooTools) are used on around 3,000,000 sites each according to tracking estimates
msn.com, twitter.com, & amazon.com are among the top sites using jQuery
There is even a a jQuery-based Commodore 64 emulator!
There is at least 4,830 official jquery plugins on the jquery plugin website!