Residential delivery area · Texas
ZIP Code 78663: Round Mountain, TX
ZIP code 78663 uses the postal name Round Mountain, Texas and lies mostly in Blanco County (93% of its land), reaching into Travis County and Hays County (Census 2020 ZIP-county file). About 500 people live there (Census Bureau, ACS 2020-2024). Median household income is $168,125 (Census Bureau, ACS 2020-2024). By Census place, 2% of its land lies in Round Mountain; 98% is outside any Census place.
- ACS2020-24
- Census2020
- ZBP2023
- IRS2022
- Town
- Round Mountain · its only residential ZIP
- County
- Blanco County (93%); Travis County (4%); Hays County (2%)
- Census places
- Round Mountain
- House districts
- TX-21 (95%), TX-10 (4%) 119th Congress, by share of land
- State
- Texas
- Time zone
- Central
- Land area
- 108.5 sq mi · 5 people per sq mi
Where is ZIP code 78663?
78663 centers on 30.416°, -98.312° and covers 108.5 square miles of land plus 0.6 of water. It borders 6 ZIP codes: 78657, 78636, 78669, 78654, 78620, 78643.
The map draws ZIP code areas only. For the streets inside 78663, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 78663 compare with the rest of Blanco County?
| Measure | 78663 | In Blanco County | In TX |
|---|---|---|---|
| People (ACS 2020-2024) | 503 | 7th of 8 | 1,601st of 1,990 |
| Median household income | $168k | not ranked | not ranked |
| Median home value | $357k | not ranked | not ranked |
78663's income and home value are not ranked: it has fewer than 1,000 residents (503). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 10% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 78663?
The 2020 Census counted 815 people in 78663; the ACS, which samples households over 2020-2024, estimates 503. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 503±157 (90% margin)
- 2020 Census count
- 815
- Households
- 276
- Median age
- 65.4
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 78663?
Of the 503 people the ACS estimates in 78663, 5.0% are under 18 and 51.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (92.2%).
- Under 185.0%
- 18 to 6443.9%
- 65 and older51.1%
- White, not Hispanic92.2%
- Hispanic or Latino7.6%
- Other or two or more0.2%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 78663 earn?
Median household income is $168,125 (ACS 2020-2024).
- Median household income
- $168,125±$143,471
- Income per person
- $100,059
- Below the poverty line
- 3.6%
- Unemployed (of the labor force)
- 0.4%
- Adults 25+ with a bachelor's degree
- 42.7%
- Adjusted gross income per tax return, 2022
- $155,406470 returns; wages 41% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 78663?
- Median home value (owners' estimate)
- $356,800
- Median gross rent
- $1,688
- Homes owned by their occupants
- 83.0%
- Housing units
- 288
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 78663?
32 business establishments had a location in this ZIP code in 2023, 10 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction9
- Professional, scientific, and technical services5
- Retail trade4
- Manufacturing3
- Wholesale trade3
- Finance and insurance3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 78663?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78657 | Horseshoe Bay | 7,591 | $92k | 9.1 mi |
| 78636 | Johnson City | 4,134 | $73k | 9.6 mi |
| 78669 | Spicewood | 12,592 | $128k | 11.4 mi |
| 78654 | Marble Falls | 20,650 | $74k | 12.4 mi |
| 78620 | Dripping Springs | 22,860 | $154k | 16.8 mi |
| 78643 | Llano | 7,088 | $68k | 30.1 mi |
| 78639 | Kingsland | 8,719 | $58k | 18.7 mi (near) |
| 78635 | Hye | 92 | $107k | 20.1 mi (near) |
| 78645 | Leander | 15,256 | $113k | 20.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.