If you ever used Google Places API, you’re probably familiar with types option,
which allows you to restrict auto-complete results in different ways.
I had a requirement to show only cities in UK.
If you want to all the cities than you can try below code.
<!DOCTYPE html>
<html>
<head>
<title>Google Maps JavaScript API v3 Example: Places Autocomplete</title>
<script src="https://maps.googleapis.com/maps/api/js?sensor=false&libraries=places"></script>
<script type="text/javascript">
function initialize() {
var input = document.getElementById('searchTextField');
var options = {
language: 'en-GB',
types: ['(cities)'],
//componentRestrictions: { country: "uk" }
};
new google.maps.places.Autocomplete(input, options);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
<style type="text/css">
.pac-icon {width: 0;background-image: none;}
</style>
</head>
<body>
<label for="searchTextField">Please insert an address:</label>
<input id="searchTextField" type="text" size="50">
</body>
</html>