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Where 78840 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 78840 into a pocket calculator and turn it upside down: OhBBL — not quite a word, sorry.
- ➕ As a number, 78,840 = 2 × 2 × 2 × 3 × 3 × 3 × 5 × 73. Its digits add up to 27, a total 1,806 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011001111111000 - 🏠 Its numerical neighbours: 78839 (Crystal City, TX, 100 mi away) and 78841 (Del Rio, TX, 34 mi away).
- 🔄 Backwards, 78840 becomes 04887, which is not a ZIP code at all.
- 👥 17 other ZIP codes are made of exactly the same digits (07848, 47808, 47880, 48708, 48807, 48870, …). The farthest-flung twin is 07848 in Lafayette, NJ, 1,664 miles away.
- 🧭 Farther south than 94% of all ZIP codes, and farther west than 80%.
- 🎯710 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 78840 and you would come out at 29.73°S, 79.07°E — 1,433 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 03m of daylight. Shortest: 10h 14m.
- 📏 At 1,046.3 square miles of land, 78840 is bigger than 99% of ZIP codes — room for about 794 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 47,256This ZIP47,256 |
|---|---|
| Households | 16,721This ZIP16,721 |
| Housing units | 18,575This ZIP18,575 |
| Median age | 32.4This ZIP32.4Texas35.6US 38.9 |
| Median household income | $66,084This ZIP$66,084Texas$78,476US $80,734 |
| Median home value | $164,600This ZIP$164,600Texas$283,800US $332,700 |
| Median gross rent | $995This ZIP$995Texas$1,403US $1,413 |
| Bachelor's degree or higher | 22.3%This ZIP22.3% |
| Mean commute | 19.3 minThis ZIP19.3 min |
| Population density | 45.2 / sq miThis ZIP45.2 / sq mi |
Business and tax activity
| Business establishments | 749This ZIP749 |
|---|---|
| Employees | 11,483This ZIP11,483 |
| Annual payroll | $404,826,000This ZIP$404,826,000 |
| Tax returns filed | 20,970This ZIP20,970 |
| Total adjusted gross income | $1,140,025,000This ZIP$1,140,025,000 |
Land area
| Land area | 1,046.30 sq miThis ZIP1,046.30 sq mi |
|---|---|
| Water area | 64.34 sq miThis ZIP64.34 sq mi |
Other place names in 78840
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 78840
| ZIP | City | Distance |
|---|---|---|
78842 | Del Rio, TX | 7.8 mi |
78847 | Del Rio, TX | 25.4 mi |
78837 | Comstock, TX | 25.6 mi |
78843 | Laughlin Afb, TX | 27.9 mi |
78841 | Del Rio, TX | 33.8 mi |
78832 | Brackettville, TX | 39.0 mi |
78880 | Rocksprings, TX | 41.9 mi |
78871 | Langtry, TX | 43.3 mi |
76950 | Sonora, TX | 53.4 mi |
78828 | Barksdale, TX | 55.5 mi |
Find every ZIP code within 10 miles of 78840 →
Questions about this ZIP code
Where is ZIP code 78840?
78840 is in Del Rio, Texas, in Val Verde County, part of the Del Rio, TX micropolitan area. Its published point location is 29.7298, -100.9260.
What county is 78840 in?
78840 lies in Val Verde County.
What area code is 78840?
Del Rio uses area code 830, from NANPA's telephone records.
What time zone is 78840 in?
78840 uses America/Chicago.
How many people live in 78840?
About 47,256 people live in ZIP code 78840, in 16,721 households, at 45.2 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 78840?
$66,084 a year, against $78,476 across Texas.
What ZIP codes are near 78840?
The closest are 78842 (7.8 mi), 78847 (25.4 mi), 78837 (25.6 mi), 78843 (27.9 mi) and 78841 (33.8 mi).
Is 78840 a PO Box ZIP code?
78840 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “78840 ZIP Code — Del Rio, Texas (Val Verde County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78840
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/78840.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.