Finding registered users by registration date can come in handy, especially when you want to manage users. This is a feature I would love to see in WordPress core for single site. But for now you can use this in a plugin called Recently Registered. This plugin works just like it does on WordPress multisite, only it’s made for single site. It offers a new column within your users lists, showing the date they registered on your blog or website, below is a screenshot from one of the site I manage.
Note that you do NOT need to use this plugin if you have WordPress multisite installation active, as it already have this feature. Once you install and activate the plugin go to the Users page, and pull down the Screen Options and check the registered option then apply the changes. You can now sort by registration date.
You can Download Recently Registered plugin from the WordPress plugin repository.