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Where 78140 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.
- 🔢 Type 78140 into a pocket calculator and turn it upside down: OhIBL — not quite a word, sorry.
- ➕ As a number, 78,140 = 2 × 2 × 5 × 3907. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011000100111100 - 🏠 Its numerical neighbours: 78135 (New Braunfels, TX, 35 mi away) and 78141 (Nordheim, TX, 29 mi away).
- 🔄 Backwards, 78140 becomes 04187, which is not a ZIP code at all.
- 👥 57 other ZIP codes are made of exactly the same digits (01748, 01784, 04781, 07184, 07418, 07481, …). The farthest-flung twin is 04781 in Wallagrass, ME, 1,986 miles away.
- 🧭 Farther south than 95% of all ZIP codes, and farther west than 76%.
- 🎯728 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 78140 and you would come out at 29.31°S, 82.24°E — 1,511 miles from West Island, Cocos Islands, the nearest big city to that spot.
- ☀Longest day of the year: 14h 01m of daylight. Shortest: 10h 16m.
- 📏 At 175.0 square miles of land, 78140 is bigger than 89% of ZIP codes — room for about 133 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 3,474This ZIP3,474 |
|---|---|
| Households | 1,278This ZIP1,278 |
| Housing units | 1,410This ZIP1,410 |
| Median age | 36.2This ZIP36.2Texas35.6US 38.9 |
| Median household income | $50,250This ZIP$50,250Texas$78,476US $80,734 |
| Median home value | $85,200This ZIP$85,200Texas$283,800US $332,700 |
| Median gross rent | $845This ZIP$845Texas$1,403US $1,413 |
| Bachelor's degree or higher | 6.2%This ZIP6.2% |
| Mean commute | 26.4 minThis ZIP26.4 min |
| Population density | 19.8 / sq miThis ZIP19.8 / sq mi |
Business and tax activity
| Business establishments | 50This ZIP50 |
|---|---|
| Employees | 776This ZIP776 |
| Annual payroll | $41,462,000This ZIP$41,462,000 |
| Tax returns filed | 1,500This ZIP1,500 |
| Total adjusted gross income | $92,726,000This ZIP$92,726,000 |
Land area
| Land area | 175.04 sq miThis ZIP175.04 sq mi |
|---|---|
| Water area | 0.74 sq miThis ZIP0.74 sq mi |
Counties 78140 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Gonzales County | 67.6% |
| Wilson County | 27.2% |
| Guadalupe County | 3.3% |
| Karnes County | 1.9% |
Other place names in 78140
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 78140
| ZIP | City | Distance |
|---|---|---|
78143 | Pandora, TX | 6.3 mi |
78160 | Stockdale, TX | 9.8 mi |
78677 | Wrightsboro, TX | 10.8 mi |
78122 | Leesville, TX | 10.9 mi |
78159 | Smiley, TX | 12.1 mi |
78614 | Cost, TX | 12.8 mi |
78116 | Gillett, TX | 14.2 mi |
78604 | Belmont, TX | 15.7 mi |
78161 | Sutherland Springs, TX | 17.3 mi |
78111 | Ecleto, TX | 18.8 mi |
Find every ZIP code within 10 miles of 78140 →
Questions about this ZIP code
Where is ZIP code 78140?
78140 is in Nixon, Texas, in Gonzales County. Its published point location is 29.3068, -97.7634.
What county is 78140 in?
78140 spans 4 counties: Gonzales County, Wilson County, Guadalupe County and Karnes County. Most of it falls in Gonzales 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 78140?
Nixon uses area code 830, from NANPA's telephone records.
What time zone is 78140 in?
78140 uses America/Chicago.
How many people live in 78140?
About 3,474 people live in ZIP code 78140, in 1,278 households, at 19.8 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 78140?
$50,250 a year, against $78,476 across Texas.
What ZIP codes are near 78140?
The closest are 78143 (6.3 mi), 78160 (9.8 mi), 78677 (10.8 mi), 78122 (10.9 mi) and 78159 (12.1 mi).
Is 78140 a PO Box ZIP code?
78140 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “78140 ZIP Code — Nixon, Texas (Gonzales County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78140
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/78140.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.