How to make ‘Province’ field unrequired in woocommerce checkout page?

Solution:

I don’t think the “province” is a default woocommerce checkout field, but here is an example you can use if you know the right “province” field name :

insert this into your functions.php file inside your WordPress theme.

add_filter( 'woocommerce_billing_fields', 'wc_cf_filter_state', 10, 1 );

function wc_cf_filter_state( $fields ) {
    $fields ['billing_state']['required'] = false;
    return $fields ;
}