Austin is situated on the Colorado River, with three man-made (artificial) lakes within the city limits: Lady Bird Lake (formerly known as Town Lake), Lake Austin (both created by dams along the Colorado River), and Lake Walter E. Long that is partly used for cooling water for the Decker Power Plant.
Город расположен на реке Колорадо, на его территории создано три искусственных озера: озеро Леди Бёрд (Lady Bird Lake, ранее называвшееся Городским озером, Town Lake), озеро Остин (Lake Austin), а также озеро Вальтера Е. Лонга (Lake Walter E. Long).