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Where 77831 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 77831 into a pocket calculator and turn it upside down: IEBLL — not quite a word, sorry.
- ➕ As a number, 77,831 = 13 × 5987. Its digits add up to 26, a total 2,038 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011000000000111 - 🏠 Its numerical neighbours: 77830 (Anderson, TX, 15 mi away) and 77833 (Brenham, TX, 47 mi away).
- 🔄 Backwards, 77831 becomes 13877, which is not a ZIP code at all.
- 👥 24 other ZIP codes are made of exactly the same digits (13778, 13787, 17837, 18773, 31778, 31787, …). The farthest-flung twin is 83717 in Boise, ID, 1,418 miles away.
- 🧭 Farther south than 91% of all ZIP codes, and farther west than 71%.
- 🎯646 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 77831 and you would come out at 30.73°S, 84.09°E — 1,476 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 08m of daylight. Shortest: 10h 09m.
- 📏 At 226.7 square miles of land, 77831 is bigger than 92% of ZIP codes — room for about 172 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 3,676This ZIP3,676 |
|---|---|
| Households | 1,257This ZIP1,257 |
| Housing units | 1,759This ZIP1,759 |
| Median age | 40.6This ZIP40.6Texas35.6US 38.9 |
| Median household income | $58,229This ZIP$58,229Texas$78,476US $80,734 |
| Median home value | $195,200This ZIP$195,200Texas$283,800US $332,700 |
| Median gross rent | $1,285This ZIP$1,285Texas$1,403US $1,413 |
| Bachelor's degree or higher | 22.9%This ZIP22.9% |
| Mean commute | 44.4 minThis ZIP44.4 min |
| Population density | 16.2 / sq miThis ZIP16.2 / sq mi |
Business and tax activity
| Business establishments | 25This ZIP25 |
|---|---|
| Employees | 150This ZIP150 |
| Annual payroll | $8,698,000This ZIP$8,698,000 |
| Tax returns filed | 1,570This ZIP1,570 |
| Total adjusted gross income | $105,951,000This ZIP$105,951,000 |
Land area
| Land area | 226.75 sq miThis ZIP226.75 sq mi |
|---|---|
| Water area | 2.34 sq miThis ZIP2.34 sq mi |
Counties 77831 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Grimes County | 76.5% |
| Walker County | 22.2% |
| Madison County | 1.2% |
Other place names in 77831
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 77831
| ZIP | City | Distance |
|---|---|---|
77876 | Shiro, TX | 9.7 mi |
77875 | Roans Prairie, TX | 10.8 mi |
77861 | Iola, TX | 12.0 mi |
77873 | Richards, TX | 12.1 mi |
77830 | Anderson, TX | 14.8 mi |
77872 | North Zulch, TX | 15.1 mi |
77864 | Madisonville, TX | 15.8 mi |
77342 | Huntsville, TX | 20.7 mi |
77341 | Huntsville, TX | 20.8 mi |
77343 | Huntsville, TX | 21.2 mi |
Find every ZIP code within 10 miles of 77831 →
Questions about this ZIP code
Where is ZIP code 77831?
77831 is in Bedias, Texas, in Grimes County. Its published point location is 30.7318, -95.9075.
What county is 77831 in?
77831 spans 3 counties: Grimes County, Walker County and Madison County. Most of it falls in Grimes 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 77831?
Bedias uses area code 936, from NANPA's telephone records.
What time zone is 77831 in?
77831 uses America/Chicago.
How many people live in 77831?
About 3,676 people live in ZIP code 77831, in 1,257 households, at 16.2 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 77831?
$58,229 a year, against $78,476 across Texas.
What ZIP codes are near 77831?
The closest are 77876 (9.7 mi), 77875 (10.8 mi), 77861 (12 mi), 77873 (12.1 mi) and 77830 (14.8 mi).
Is 77831 a PO Box ZIP code?
77831 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “77831 ZIP Code — Bedias, Texas (Grimes County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/77831
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/77831.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.