Post Oak Falls is a 160-foot waterfall on Post Oak Creek in San Saba County, Texas, in the Edwards Plateau region. It lies about 16.9 miles west of Lampasas and roughly 44 miles west of Killeen as the crow flies.
At 160 feet it is among the ten tallest of the 34 Texas waterfalls with a recorded height, ranking 7th. The tallest single drop is 100 feet.
The Edwards Plateau is a limestone upland of juniper-oak savanna and clear, spring-fed rivers, the Texas Hill Country. Waterfalls spill over travertine and limestone ledges into pools.
San Saba County holds 5 recorded waterfalls, and several are close by. Spicewood Falls, is under a mile away. Gorman Falls, 100 feet high, is about 3.9 miles away. Deer Creek Falls, is about 4.5 miles away.
Post Oak Falls is located at 31.0057° N, 98.4594° W. The listing is based on the World Waterfall Database, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The creek name is confirmed against the federal Geographic Names Information System. The position was verified on aerial imagery. Details on trails, parking and access have not been documented for this waterfall yet.