Making woocommerce checkout form state field not required based on selected country

4 comments

1. In case someone stumbles on this, Woocommerce changed the name of the state fields. Below is the updated solution:

   add_filter( 'woocommerce_checkout_fields','custom_override_default_address_fields' );
   
   function custom_override_default_address_fields($fields){
       global $woocommerce;
       $country = $woocommerce->customer->get_country();
   
       if($country !== 'US'){
           $fields['billing']['billing_state']['required'] = false;
           $fields['shipping']['shipping_state']['required'] = false;
       }
   
       return $fields;
   }
   

2. Try this (in your functions.php)

   add_filter( 'woocommerce_default_address_fields' , 'custom_override_default_address_fields' );
   function custom_override_default_address_fields( $address_fields ) {
        global $woocommerce;
        $country = $woocommerce->customer->get_country();
        if($country !== 'US'){
           $address_fields['state']['required'] = false;
        }
        return $address_fields;
   }
   

   This will make the ‘state’ field optional when the visitor is not from USA.
   Hope this helps.

   UPDATE

   add_filter( 'woocommerce_checkout_fields', 'custom_override_default_address_fields' );
   function custom_override_default_address_fields($fields){
       global $woocommerce;
       $country = $woocommerce->customer->get_country();
       if($country !== 'US'){
           $fields['billing']['state']['required'] = false;
           $fields['shipping']['state']['required'] = false;
       }
       return $fields;
   }
   

3. add_filter( 'woocommerce_default_address_fields' , 'custom_override_state_required' );
   function custom_override_state_required( $address_fields ) {
     $wc = WC();
     $country = $wc->customer->get_country();
     if($country !== 'US'){
        $address_fields['state']['required'] = false;
     }
     return $address_fields;
   }
   

   This is code that worked for me. I am posting this answer without editing @zipkundan answer because I don’t see any mistakes in his answer but somehow it was not working for me. That may be because of WooCommerce version or may have another reason!! I recommend to try both answers if someone have similar requirements.

4. I had trouble getting the other answers to work until I realized there’s also the woocommerce_get_country_locale hook from WC_Countries. Which sets state required based on the chosen country through javascript in the frontend.

   add_filter('woocommerce_get_country_locale', 'update_country_locales', 10 , 1);
   
   function update_country_locales($countries) {
   
       foreach ($countries as $country => $fields) {
           if (isset($fields['state']) && $country != 'US') {
               $countries[$country]['state']['required'] = false;
           }
       }
   
       return $countries;
   }
   

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