MMDeveloper

Easy to use plugin, that blocks access to your wp-admin area by country. Uses geoip-api-php as the library to work out the visitor’s country.

Admin Block Country

It would be great to be able to redirect to a page 404

Good choice

Block access to your admin pages by country.

Jesús Rodríguez

Country Blocker for AdSense provides a fast and effective way to block ads from specific countries in AdSense based on your preferences. With this tool, you can easily avoid displaying ads to certain countries and improve the performance of your AdSense account.
<ul>
<li>This plugin is extremely simple and easy to set up.</li>
<li>Block undesired countries from displaying ads on your website.</li>
<li>This plugin is lightweight, taking up less than 8Kbs of space compared to similar plugins that often take up hundreds of Kbs.</li>
</ul>

Country Blocker for AdSense

This is a quick and efficient solution for blocking ads from specific countries based on your preferences.

Admin Block Country vs Country Blocker for AdSense