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zipcodes.pro — ZIP/78591

78591

ZIP 78591 is Santa Elena, Texas, in Starr County; area code 956; Central time.

Type
Standard
Time zone
America/Chicago
County
Starr
Population
158
Coordinates
26.6391, -98.5519
☼ Live from 78591 — Santa Elena, TX

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Where 78591 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.

★ Weird and wonderful facts about 78591
  • 🔢 Type 78591 into a pocket calculator and turn it upside down: IGSBL — not quite a word, sorry.
  • ➕ As a number, 78,591 = 3 × 17 × 23 × 67. Its digits add up to 30, a total 1,024 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001011111111
  • 🏠 Its numerical neighbours: 78590 (San Perlita, TX, 57 mi away) and 78592 (Santa Maria, TX, 59 mi away).
  • 🔄 Backwards, 78591 becomes 19587, which is not a ZIP code at all.
  • 👥 23 other ZIP codes are made of exactly the same digits (17859, 17985, 18957, 57198, 59718, 59871, …). The farthest-flung twin is 98571 in Pacific Beach, WA, 1,989 miles away.
  • 🧭 Farther south than 97% of all ZIP codes, and farther west than 78%.
  • 🎯911 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78591 and you would come out at 26.64°S, 81.45°E — 1,413 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 49m of daylight. Shortest: 10h 28m.
  • 📏 At 175.5 square miles of land, 78591 is bigger than 89% of ZIP codes — room for about 133 Central Parks.
🌙 The sky over 78591 today
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🌋 Shake report
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Source: USGS.

People and housing

Population158This ZIP158
Households76This ZIP76
Housing units205This ZIP205
Median age56.1This ZIP56.1Texas35.6US 38.9
Median household income$35,750This ZIP$35,750Texas$78,476US $80,734
Bachelor's degree or higher20.0%This ZIP20.0%
Mean commute26.0 minThis ZIP26.0 min
Population density0.9 / sq miThis ZIP0.9 / sq mi

Business and tax activity

Tax returns filed150This ZIP150
Total adjusted gross income$7,758,000This ZIP$7,758,000

Land area

Land area175.51 sq miThis ZIP175.51 sq mi
Water area0.17 sq miThis ZIP0.17 sq mi

Other place names in 78591

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 78591

ZIPCityDistance
78536 Delmita, TX 6.7 mi
78588 San Isidro, TX 11.7 mi
78582 Rio Grande City, TX 13.8 mi
78563 Linn, TX 18.5 mi
78541 Edinburg, TX 21.4 mi
78595 Sullivan City, TX 22.4 mi
78576 Penitas, TX 22.9 mi
78360 Guerra, TX 23.1 mi
78547 Garciasville, TX 24.8 mi
78574 Mission, TX 25.2 mi

Find every ZIP code within 10 miles of 78591 →

Questions about this ZIP code

Where is ZIP code 78591?

78591 is in Santa Elena, Texas, in Starr County, part of the Rio Grande City-Roma, TX micropolitan area. Its published point location is 26.6391, -98.5519.

What county is 78591 in?

78591 lies in Starr County.

What area code is 78591?

Santa Elena uses area code 956, from NANPA's telephone records.

What time zone is 78591 in?

78591 uses America/Chicago.

How many people live in 78591?

About 158 people live in ZIP code 78591, in 76 households, at 0.9 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 78591?

$35,750 a year, against $78,476 across Texas.

What ZIP codes are near 78591?

The closest are 78536 (6.7 mi), 78588 (11.7 mi), 78582 (13.8 mi), 78563 (18.5 mi) and 78541 (21.4 mi).

Is 78591 a PO Box ZIP code?

78591 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “78591 ZIP Code — Santa Elena, Texas (Starr County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78591

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