ZIP code 78663: Round Mountain, TX
78663 is a ZIP code in Round Mountain, Texas, mainly in Blanco County. About 503 people live here.
- Population
- 503
- Median household income
- $168,125
- Typical home value
- $835,400-2.1% in 12 months
- Median rent
- $1,688gross, per month
- Median age
- 65.4
- Homeowners
- 83%of occupied homes
Shaded: ZIP code 78663's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 78663 details
| City | Round Mountain |
|---|---|
| State | Texas |
| County | Blanco County (also partly Travis County, Hays County, Burnet County) |
| Metro area | Not in a metro or micro area |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 108.5 sq mi, plus 0.6 sq mi of water |
| Population density | 5 people per sq mi |
| Bachelor's degree or higher | 42.7% of adults 25+ |
| Average commute | 50.5 minutes |
| Center coordinates | 30.41552, -98.31170 |
ZIP codes near 78663
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 78657 | Horseshoe Bay, TX | 9.1 mi | 7,591 |
| 78636 | Johnson City, TX | 9.6 mi | 4,134 |
| 78669 | Spicewood, TX | 11.4 mi | 12,592 |
| 78654 | Marble Falls, TX | 12.4 mi | 20,650 |
| 78620 | Dripping Springs, TX | 16.8 mi | 22,860 |
| 78639 | Kingsland, TX | 18.7 mi | 8,719 |
| 78635 | Hye, TX | 20.1 mi | 92 |
| 78645 | Leander, TX | 20.4 mi | 15,256 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 78663?
A typical home in ZIP code 78663 is worth about $835,400 (Zillow Home Value Index). The median household here earns $168,125 a year. See what buying here would cost per month, with Texas average taxes and insurance filled in.
Monthly payment for a $835,400 homeWhat can a $168,125 income afford?Rental property numbers
About ZIP code 78663
What city is ZIP code 78663?
ZIP code 78663 is in Round Mountain, TX, in Blanco County.
What county is ZIP code 78663 in?
78663 is mainly in Blanco County, Texas, and partly in Travis County, Hays County and Burnet County.
What is the population of ZIP code 78663?
About 503 people live in ZIP code 78663, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 78663 in?
78663 is in Central Time (UTC−6). It observes daylight saving time.