Check What Version of WordPress You Are Running
Updated: December 18, 2014
The version number of the currently installed version of WordPress is listed in several places.
In the root directory of the WordPress installation the readme.html lists the version number.
In the admin interface of WordPress you can see what version you are running from the dashboard, in most versions it is at the bottom of the page, and in newer versions it will also indicate if there is a new version available.
In the source code of the website's pages the version number is listed in the following line:
<meta name="generator" content="WordPress ">
You can keep track of what versions of WordPress are running on all of the websites you manage with our Up to Date? Chrome app.
Current Version of WordPress