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County ZIP codes · Texas · FIPS 48299

Llano County, TX ZIP Codes

Llano County, Texas has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 8 of the residential ones lie mainly in Llano County and 2 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $57,742 in 78639 (Kingsland) to $91,452 in 78657 (Horseshoe Bay) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Llano County?

76831 · Castell: –76869 · Pontotoc: –76885 · Valley Spring: –78607 · Bluffton: $59k78609 · Buchanan Dam: $64k78611 · Burnet: $81k78639 · Kingsland: $58k78643 · Llano: $68k78657 · Horseshoe Bay: $92k78672 · Tow: $53k78643786117686976885786397860778657786097867276831 · Castell: –76869 · Pontotoc: –76885 · Valley Spring: –78607 · Bluffton: $59k78609 · Buchanan Dam: $64k78611 · Burnet: $81k78639 · Kingsland: $58k78643 · Llano: $68k78657 · Horseshoe Bay: $92k78672 · Tow: $53k78643786117686976885786397860778657786097867276831 · Castell: –76869 · Pontotoc: –76885 · Valley Spring: –78607 · Bluffton: $59k78609 · Buchanan Dam: $64k78611 · Burnet: $81k78639 · Kingsland: $58k78643 · Llano: $68k78657 · Horseshoe Bay: $92k78672 · Tow: $53k7864378611768697688578639786077865778672
The residential ZIP codes of Llano County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $64,418 and $80,938.

They carry 10 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 10 residential ZIP codes in Llano County

8 ZIP codes lie mainly in Llano County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Llano County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
78639 Kingsland 8,719 199 $58k $246k 83%
78657 Horseshoe Bay 7,591 196 $92k $483k 69%
78643 Llano 7,088 10 $68k $363k 100%
78609 Buchanan Dam 1,983 125 $64k $320k 100%
78672 Tow 570 19 $53k $213k 100%
76885 Valley Spring 142 2 – $787k 100%
78607 Bluffton 118 5 $59k $244k 100%
76831 Castell no residents 0 – – 100%

Partly in Llano County

Residential ZIP codes mainly in another county that reach at least 1% into Llano County, by their share here
In this county
76869 Pontotoc no residents 0 – – 23%
78611 Burnet 14,560 53 $81k $319k 2%

Download the 10 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

4 ZIP codes of Llano County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Llano County and in the neighboring counties
ZIPIn LlanoElsewhere
786112%Burnet County 98%
7863983%Burnet County 17%
7865769%Burnet County 31%
7686923%San Saba County 39%; Mason County 38%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Llano County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Llano County's ZIP codes use 2 prefixes: 768 and 786.

Three-digit prefixes of Llano County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Llano County's
PrefixSectional centerHereAll codes
768 Abilene, TX (SCF 795) 3 53
786 Austin, TX (SCF 786) 7 75

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.