77991
ZIP 77991 is Vanderbilt, Texas, in Jackson County; area code 361; Central time.
- Type
- Standard
- Time zone
- America/Chicago
- County
- Jackson
- Metro area
- none
- Population
- 440
- Coordinates
- 28.7854, -96.5960
Weather right now
Asking the National Weather Service…
Where 77991 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 77991 into a pocket calculator and turn it upside down: IGGLL — not quite a word, sorry.
- ➕ As a number, 77,991 = 3 × 25997. Its digits add up to 33, a total 456 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011000010100111 - 🏠 Its numerical neighbours: 77990 (Tivoli, TX, 29 mi away) and 77993 (Weesatche, TX, 50 mi away).
- 🔄 Backwards, 77991 becomes 19977 — and that is a real ZIP code: Smyrna, DE, 1,402 miles away.
- 👥 7 other ZIP codes are made of exactly the same digits (17979, 19977, 79719, 79917, 91977, 97917, …). The farthest-flung twin is 99771 in Shaktoolik, AK, 3,687 miles away.
- 🧭 Farther south than 95% of all ZIP codes, and farther west than 73%.
- 🎯771 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 77991 and you would come out at 28.79°S, 83.40°E — 1,438 miles from West Island, Cocos Islands, the nearest big city to that spot.
- ☀Longest day of the year: 13h 59m of daylight. Shortest: 10h 18m.
- 📏 At 10.6 square miles of land, 77991 is bigger than 28% of ZIP codes — room for about 8.1 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 440This ZIP440 |
|---|---|
| Households | 94This ZIP94 |
| Housing units | 94This ZIP94 |
| Median age | 14.8This ZIP14.8Texas35.6US 38.9 |
| Median home value | $107,600This ZIP$107,600Texas$283,800US $332,700 |
| Bachelor's degree or higher | 39.7%This ZIP39.7% |
| Mean commute | 34.1 minThis ZIP34.1 min |
| Population density | 41.4 / sq miThis ZIP41.4 / sq mi |
Business and tax activity
| Business establishments | 8This ZIP8 |
|---|---|
| Employees | 51This ZIP51 |
| Annual payroll | $3,626,000This ZIP$3,626,000 |
Land area
| Land area | 10.64 sq miThis ZIP10.64 sq mi |
|---|---|
| Water area | 1.26 sq miThis ZIP1.26 sq mi |
Other place names in 77991
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 77991
| ZIP | City | Distance |
|---|---|---|
77969 | La Salle, TX | 3.5 mi |
77971 | Lolita, TX | 5.6 mi |
77978 | Point Comfort, TX | 6.7 mi |
77970 | La Ward, TX | 10.7 mi |
77979 | Port Lavaca, TX | 12.2 mi |
77961 | Francitas, TX | 13.9 mi |
77977 | Placedo, TX | 14.4 mi |
77988 | Telferner, TX | 17.8 mi |
77962 | Ganado, TX | 17.9 mi |
77968 | Inez, TX | 18.0 mi |
Find every ZIP code within 10 miles of 77991 →
Questions about this ZIP code
Where is ZIP code 77991?
77991 is in Vanderbilt, Texas, in Jackson County. Its published point location is 28.7854, -96.5960.
What county is 77991 in?
77991 lies in Jackson County.
What area code is 77991?
Vanderbilt uses area code 361, from NANPA's telephone records.
What time zone is 77991 in?
77991 uses America/Chicago.
How many people live in 77991?
About 440 people live in ZIP code 77991, in 94 households, at 41.4 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 77991?
The closest are 77969 (3.5 mi), 77971 (5.6 mi), 77978 (6.7 mi), 77970 (10.7 mi) and 77979 (12.2 mi).
Is 77991 a PO Box ZIP code?
77991 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “77991 ZIP Code — Vanderbilt, Texas (Jackson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/77991
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/77991.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.