Lago Vista, Texas is a lakeside community located on the northern shores of Lake Travis. The city is located within Travis County, Texas, United States, and is less than 20 miles from downtown Austin. Much of Lago Vista is located on a peninsula that extends across 15.52 square miles of Texas Hill Country. The Colorado River runs adjacent to the city. Travis County experienced a population increase of 26.9% between 2010 and 2020, while Lago Vista grew by 47.3% during the decade.