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zipcodes.pro — ZIP/78618

78618

ZIP 78618 is Doss, Texas, mostly in Gillespie County; area code 830; Central time.

Type
Standard
Time zone
America/Chicago
County
Gillespie +1 more
Metro area
Fredericksburg, TX
Population
346
Coordinates
30.4882, -99.1736
☼ Live from 78618 — Doss, TX

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Where 78618 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 78618
  • 🔢 Type 78618 into a pocket calculator and turn it upside down: BIgBL — not quite a word, sorry.
  • ➕ As a number, 78,618 = 2 × 3 × 13103. Its digits add up to 30, a total 1,024 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001100011010
  • 🏠 Its numerical neighbours: 78617 (Del Valle, TX, 97 mi away) and 78619 (Driftwood, TX, 73 mi away).
  • 🔄 Backwards, 78618 becomes 81687, which is not a ZIP code at all.
  • 👥 11 other ZIP codes are made of exactly the same digits (16878, 17868, 17886, 61878, 68178, 68718, …). The farthest-flung twin is 17868 in Riverside, PA, 1,450 miles away.
  • 🧭 Farther south than 92% of all ZIP codes, and farther west than 79%.
  • 🎯646 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78618 and you would come out at 30.49°S, 80.83°E — 1,416 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 07m of daylight. Shortest: 10h 10m.
  • 📏 At 158.8 square miles of land, 78618 is bigger than 87% of ZIP codes — room for about 121 Central Parks.
🌙 The sky over 78618 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population346This ZIP346
Households173This ZIP173
Housing units303This ZIP303
Median age63.8This ZIP63.8Texas35.6US 38.9
Median household income$81,528This ZIP$81,528Texas$78,476US $80,734
Median home value$349,300This ZIP$349,300Texas$283,800US $332,700
Bachelor's degree or higher31.2%This ZIP31.2%
Mean commute44.9 minThis ZIP44.9 min
Population density2.2 / sq miThis ZIP2.2 / sq mi

Business and tax activity

Business establishments9This ZIP9
Employees48This ZIP48
Annual payroll$856,000This ZIP$856,000
Tax returns filed140This ZIP140
Total adjusted gross income$18,361,000This ZIP$18,361,000

Land area

Land area158.85 sq miThis ZIP158.85 sq mi
Water area0.15 sq miThis ZIP0.15 sq mi

Counties 78618 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Gillespie County 61.8%
Mason County 38.2%

ZIP codes near 78618

ZIPCityDistance
78631 Harper, TX 13.0 mi
76856 Mason, TX 15.2 mi
76854 London, TX 21.6 mi
76820 Art, TX 21.9 mi
78624 Fredericksburg, TX 22.6 mi
76831 Castell, TX 22.6 mi
78675 Willow City, TX 28.0 mi
78025 Ingram, TX 29.1 mi
78643 Llano, TX 30.3 mi
76842 Fredonia, TX 30.4 mi

Find every ZIP code within 10 miles of 78618 →

Questions about this ZIP code

Where is ZIP code 78618?

78618 is in Doss, Texas, in Gillespie County, part of the Fredericksburg, TX micropolitan area. Its published point location is 30.4882, -99.1736.

What county is 78618 in?

78618 spans 2 counties: Gillespie County and Mason County. Most of it falls in Gillespie County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 78618?

Doss uses area code 830, from NANPA's telephone records.

What time zone is 78618 in?

78618 uses America/Chicago.

How many people live in 78618?

About 346 people live in ZIP code 78618, in 173 households, at 2.2 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 78618?

$81,528 a year, against $78,476 across Texas.

What ZIP codes are near 78618?

The closest are 78631 (13 mi), 76856 (15.2 mi), 76854 (21.6 mi), 76820 (21.9 mi) and 78624 (22.6 mi).

Is 78618 a PO Box ZIP code?

78618 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “78618 ZIP Code — Doss, Texas (Gillespie County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78618

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