Also a descent touch if not overused (since it worsens readability) is to do:
<?php if( $county = get_field('county') ) { ?>
<?php echo $county . ' County' ; ?>
<?php } ?>
That will only call to the get_field function once thus saving you some resources. However as I said some would argue that this is bad practise as it can be harder to read (for humans) especially when it gets more complicated with many if statements etc.
