IP2Location

This widget displays the geolocation information of the current visitors who are visiting your websites. This useful library makes it easy to conveniently find website visitors location and displays the geo location information of country, region, city and time of their visit by using the geolocation technology powered by <a href="https://www.ip2location.com" rel="nofollow ugc">IP2Location</a>.
This plugin frees you from the hassle to setup the database for geolocation information retrieval, as the information will be retrieved from the hosted server.
This plugin comes with several variation of themes for selection. In addition, you can also modify and design the appearance of this widget for the size, the color and much more, to ensure seamless integration with your existing WordPress themes.
<h4>More Information</h4>
Please visit us at <a href="https://www.ip2location.com" title="https://www.ip2location.com" rel="nofollow ugc">https://www.ip2location.com</a>

IPLocationTools

Widget to display visitors’ geolocation information, such as country, region and city, in real-time.

Richer Yang

This plubin is based on <a href="https://tw.wordpress.org/plugins/wc-city-select/" rel="nofollow ugc">WC City Select</a>
WooCommerce uses a text input for the customers to enter the city or town. 
With this plugin you can provide a list of cities to be shown as a select dropdown.
This will be shown in checkout pages, edit addresses pages and shipping calculator if it’s configured that way.
After selected the city or town, auto set the postcode number if is defined.
<h3>How to add cities</h3>
A list of cities can be added in your theme functions.php file.
Use <code>ry_wc_city_select_cities</code> filter to load your cities. 
This is done similarly to <a href="https://docs.woocommerce.com/document/addmodify-states/" rel="nofollow ugc">Add/Modify States</a>. 
It should be added on your functions.php or a custom plugin.
<pre><code>add_filter( 'ry_wc_city_select_cities', 'my_cities' );
/**
 * Replace XX with the country code. Instead of YYY, ZZZ use actual state codes.
 * The City list can list of city name with postcode or just city name.
 */
function my_cities( $cities ) {
 $cities['XX'] = array(
 'YYY' => array( // city name with postcoe
 ['City', '100'],
 ['Another City', '101']
 ),
 'ZZZ' => array( // just city name
 'City 3',
 'City 4'
 )
 );
 return $cities;
}
</code></pre>

RY City Select for WooCommerce

Show a dropdown select as the cities input on WooCommerce. Auto set the postcode for selected city.

IPLocationTools vs RY City Select for WooCommerce