Lago Vista is a city near Lake Travis and is part of the Austin in Travis County in the 78645 zip code. Lago Vista is served by the Lake Travis Independent School District. Search homes for sale in Lago Vista, TX, a city located in Travis County. View single family homes, condos, garden homes, and new construction for sale in Lago Vista, TX 78645. For more info about any of these Lago Vista real estate listings, click the "Request More Information" button located on the detail page of each property. Receive email alerts whenever new listings hit the Lago Vista real estate market that match your specific search criteria.