Yes, you can. You can find detailed information on how to do that in these support articles:
Note: When you import customers from one of these sources they don't have geolocation information associated with their site or billing contact addresses. For more information about this please read the article: Why do bulk imported customers not show on the map?
You can also import your customers from a CSV file. Please see the support article, How to import and update customer information in bulk, for more information.