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zipcodes.pro — ZIP/78121

78121

ZIP 78121 is La Vernia, Texas, mostly in Wilson County; area code 830; Central time.

Type
Standard
Time zone
America/Chicago
County
Wilson +1 more
Population
16,120
Coordinates
29.3511, -98.0889
☼ Live from 78121 — La Vernia, TX

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Local time: —

Where 78121 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 78121
  • 🔢 Type 78121 into a pocket calculator and turn it upside down: IZIBL — not quite a word, sorry.
  • ➕ 78121 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 19, a total 2,454 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011000100101001
  • 🏠 Its numerical neighbours: 78119 (Kenedy, TX, 45 mi away) and 78122 (Leesville, TX, 24 mi away).
  • 🔄 Backwards, 78121 becomes 12187 — and that is a real ZIP code: Warnerville, NY, 1,599 miles away.
  • 👥 25 other ZIP codes are made of exactly the same digits (11782, 12187, 12781, 12817, 12871, 17128, …). The farthest-flung twin is 12817 in Chestertown, NY, 1,660 miles away.
  • 🧭 Farther south than 95% of all ZIP codes, and farther west than 77%.
  • 🎯724 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78121 and you would come out at 29.35°S, 81.91°E — 1,512 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 02m of daylight. Shortest: 10h 16m.
  • 📏 At 102.6 square miles of land, 78121 is bigger than 78% of ZIP codes — room for about 78 Central Parks.
🌙 The sky over 78121 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population16,120This ZIP16,120
Households5,274This ZIP5,274
Housing units5,426This ZIP5,426
Median age38.2This ZIP38.2Texas35.6US 38.9
Median household income$120,048This ZIP$120,048Texas$78,476US $80,734
Median home value$402,600This ZIP$402,600Texas$283,800US $332,700
Median gross rent$1,192This ZIP$1,192Texas$1,403US $1,413
Bachelor's degree or higher32.1%This ZIP32.1%
Mean commute36.0 minThis ZIP36.0 min
Population density157.1 / sq miThis ZIP157.1 / sq mi

Business and tax activity

Business establishments284This ZIP284
Employees2,023This ZIP2,023
Annual payroll$76,984,000This ZIP$76,984,000
Tax returns filed7,470This ZIP7,470
Total adjusted gross income$778,762,000This ZIP$778,762,000

Land area

Land area102.62 sq miThis ZIP102.62 sq mi
Water area0.32 sq miThis ZIP0.32 sq mi

Counties 78121 spans

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

CountyShare of this ZIP
Wilson County 75.1%
Guadalupe County 24.9%

Other place names in 78121

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 78121

ZIPCityDistance
78161 Sutherland Springs, TX 5.0 mi
78152 Saint Hedwig, TX 8.8 mi
78101 Adkins, TX 9.0 mi
78160 Stockdale, TX 13.1 mi
78263 San Antonio, TX 13.6 mi
78115 Geronimo, TX 13.7 mi
78124 Marion, TX 14.7 mi
78109 Converse, TX 15.1 mi
78143 Pandora, TX 15.7 mi
78155 Seguin, TX 15.8 mi

Find every ZIP code within 10 miles of 78121 →

Questions about this ZIP code

Where is ZIP code 78121?

78121 is in La Vernia, Texas, in Wilson County, part of the San Antonio-New Braunfels, TX metropolitan area. Its published point location is 29.3511, -98.0889.

What county is 78121 in?

78121 spans 2 counties: Wilson County and Guadalupe County. Most of it falls in Wilson 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 78121?

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

What time zone is 78121 in?

78121 uses America/Chicago.

How many people live in 78121?

About 16,120 people live in ZIP code 78121, in 5,274 households, at 157.1 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 78121?

$120,048 a year, against $78,476 across Texas.

What ZIP codes are near 78121?

The closest are 78161 (5 mi), 78152 (8.8 mi), 78101 (9 mi), 78160 (13.1 mi) and 78263 (13.6 mi).

Is 78121 a PO Box ZIP code?

78121 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “78121 ZIP Code — La Vernia, Texas (Wilson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78121

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