Is jQuery included in WordPress by default?

When I downloaded the latest version 3.8.1, inside wp-include/js there is a jQuery folder.

Can I assume that WordPress will always include it, meaning I don’t have to make my own call? E.g.

wp_register_script('jquery', '', array(), null, false); 

Solutions Collecting From Web of "Is jQuery included in WordPress by default?"

Yes, jQuery is part of WordPress core. But–it can become outdated, because jQuery updates can happen in between WP releases. The recent release of WordPress does use a very recent version of jQuery.

By default,


grabs jQuery from the core at /wp-includes/js/jquery/jquery.js.

The “correct” way to add jQuery to your WP site is:

function theme_scripts() {
add_action('wp_enqueue_scripts', 'theme_scripts');

Another catch–if you do use the latest jQuery, be careful that it doesn’t break plugins.

You still need to enqueue it, but you do not need to register it, as it is registered automatically.