| Official Name: | Round Mountain, Travis County, Texas |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Texas#USA |
| Pushpin Label: | Round Mountain |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Texas |
| Subdivision Type2: | County |
| Subdivision Name2: | Travis |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 932 |
| Coordinates: | 30.5756°N -97.9419°W |
| Area Code: | 512 & 737 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 2034570 |
Round Mountain is an unincorporated community in Travis County, in the U.S. state of Texas. According to the Handbook of Texas, the community had a population of 59 in 2000. It is located within the Greater Austin metropolitan area.
Round Mountain is located 24miles northwest of Austin in northwestern Travis County near the Williamson County line.
Schools that serve the community today are Bagdad Elementary School, Stacy Kaye Danielson Middle School, and Glenn High School.