Marble Falls, Texas, is a city in Burnet County, situated northwest of Austin along the Colorado River. Founded in 1887 by Adam Rankin Johnson, it serves as a regional retail and service hub for the Highland Lakes area. The city experiences a humid subtropical climate, with hot summers and mild winters. BestPlaces As of the 2020 Census, Marble Falls had a population of approximately 7,037 residents. The community is known for its scenic beauty, outdoor recreational opportunities, and as a gateway to the Texas Hill Country.