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Where 77990 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 77990 into a pocket calculator and turn it upside down: OGGLL — not quite a word, sorry.
- ➕ As a number, 77,990 = 2 × 5 × 11 × 709. Its digits add up to 32, a total 644 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011000010100110 - 🏠 Its numerical neighbours: 77989 (Thomaston, TX, 38 mi away) and 77991 (Vanderbilt, TX, 29 mi away).
- 🔄 Backwards, 77990 becomes 09977, which is not a ZIP code at all.
- 👥 11 other ZIP codes are made of exactly the same digits (07799, 07979, 77099, 79079, 79097, 79907, …). The farthest-flung twin is 99770 in Selawik, AK, 3,695 miles away.
- 🧭 Farther south than 96% of all ZIP codes, and farther west than 74%.
- 🎯789 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 77990 and you would come out at 28.48°S, 83.08°E — 1,435 miles from West Island, Cocos Islands, the nearest big city to that spot.
- ☀Longest day of the year: 13h 57m of daylight. Shortest: 10h 20m.
- 📏 At 133.2 square miles of land, 77990 is bigger than 84% of ZIP codes — room for about 101 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 590This ZIP590 |
|---|---|
| Households | 255This ZIP255 |
| Housing units | 420This ZIP420 |
| Median age | 53.8This ZIP53.8Texas35.6US 38.9 |
| Median household income | $75,417This ZIP$75,417Texas$78,476US $80,734 |
| Median home value | $54,200This ZIP$54,200Texas$283,800US $332,700 |
| Median gross rent | $1,170This ZIP$1,170Texas$1,403US $1,413 |
| Bachelor's degree or higher | 15.5%This ZIP15.5% |
| Mean commute | 21.8 minThis ZIP21.8 min |
| Population density | 4.4 / sq miThis ZIP4.4 / sq mi |
Business and tax activity
| Business establishments | 11This ZIP11 |
|---|---|
| Employees | 55This ZIP55 |
| Annual payroll | $1,584,000This ZIP$1,584,000 |
| Tax returns filed | 300This ZIP300 |
| Total adjusted gross income | $19,575,000This ZIP$19,575,000 |
Land area
| Land area | 133.22 sq miThis ZIP133.22 sq mi |
|---|---|
| Water area | 33.81 sq miThis ZIP33.81 sq mi |
Counties 77990 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Refugio County | 79.1% |
| Calhoun County | 20.9% |
Other place names in 77990
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 77990
| ZIP | City | Distance |
|---|---|---|
77973 | Mcfaddin, TX | 4.1 mi |
77951 | Bloomington, TX | 10.5 mi |
77977 | Placedo, TX | 15.5 mi |
77983 | Seadrift, TX | 15.8 mi |
77950 | Austwell, TX | 16.6 mi |
78377 | Refugio, TX | 18.3 mi |
77905 | Victoria, TX | 19.3 mi |
77979 | Port Lavaca, TX | 20.5 mi |
77901 | Victoria, TX | 22.5 mi |
77903 | Victoria, TX | 22.6 mi |
Find every ZIP code within 10 miles of 77990 →
Questions about this ZIP code
Where is ZIP code 77990?
77990 is in Tivoli, Texas, in Refugio County. Its published point location is 28.4849, -96.9249.
What county is 77990 in?
77990 spans 2 counties: Refugio County and Calhoun County. Most of it falls in Refugio 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 77990?
Tivoli uses area code 361, from NANPA's telephone records.
What time zone is 77990 in?
77990 uses America/Chicago.
How many people live in 77990?
About 590 people live in ZIP code 77990, in 255 households, at 4.4 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 77990?
$75,417 a year, against $78,476 across Texas.
What ZIP codes are near 77990?
The closest are 77973 (4.1 mi), 77951 (10.5 mi), 77977 (15.5 mi), 77983 (15.8 mi) and 77950 (16.6 mi).
Is 77990 a PO Box ZIP code?
77990 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “77990 ZIP Code — Tivoli, Texas (Refugio County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/77990
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/77990.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.